Question: What caused Franz Ferinand to throw his weapons out the train of a window?
About the article "Assassination of Archduke Franz Ferdinand of Austria", section "Planning direct action".

Candidate passages:
Planning direct action.
Danilo Ilić was a Bosnian Orthodox Serb.
He had worked as a school teacher and as a bank worker but in 1913 and 1914 he lived with, and outwardly off, his mother, who operated a small boarding house in Sarajevo.
Secretly, Ilić was leader of the Serbian-irredentist Black Hand cell in Sarajevo.
In late 1913, Danilo Ilić came to the Serbian listening post at Užice to speak to the officer in charge, Serbian Colonel C. A. Popović, who was a captain at the time and a member of the Black Hand.
Ilić recommended an end to the period of revolutionary organization building and a move to direct action against Austria-Hungary.
Popović passed Danilo Ilić on to Belgrade to discuss this matter with Chief of Serbian Military Intelligence Colonel Dragutin Dimitrijević, known more commonly as Apis.
By 1913, Apis and his fellow military conspirators (drawn heavily from the ranks of the May 1903 coup) had come to dominate what was left of the Black Hand.
There are no reports as to what took place between Ilić and Apis, but soon after their meeting, Apis's righthand man and fellow Black Hander, Serbian Major Vojislav Tankosić, who by this time was in charge of guerrilla training, called a Serbian irredentist planning meeting in Toulouse, France.
Amongst those summoned to the Toulouse meeting was Muhamed Mehmedbašić, a carpenter by trade and son of an impoverished Muslim noble from Herzegovina.
He too was a member of the Black Hand, having been sworn into the organization by Black Hand Provincial Director for Bosnia-Herzegovina Vladimir Gacinović and Danilo Ilić.
Mehmedbašić was (here quoting Albertini paraphrasing Mehmedbašić) "eager to carry out an act of terrorism to revive the revolutionary spirit of Bosnia."
During this January 1914 meeting, various possible Austro-Hungarian targets for assassination were discussed, including Franz Ferdinand.
However, the participants decided only to dispatch Mehmed Mehmedbašić to Sarajevo, to kill the Governor of Bosnia, Oskar Potiorek.
On his way to Bosnia-Herzegovina from France, police searched Mehmedbašić's train for a thief.
Thinking the police might be after him, he threw his weapons (a dagger and a bottle of poison) out the train window.
Once he arrived in Bosnia-Herzegovina he had to set about looking for replacement weapons.
A passenger on a London Underground train spots what seems to be a murder being committed on at the open window of a building overlooking the tracks. 
On Sunday, 28 June 1914, Archduke Franz Ferdinand of Austria and his wife Sophie, Duchess of Hohenberg were assassinated in Sarajevo by Gavrilo Princip during a visit that had been announced two months prior.
General Oskar Potiorek, Governor of the Austrian provinces of Bosnia and Herzegovina had invited Franz Ferdinand and Countess Sophie to the opening of a hospital.
The Archduke knew that the visit would be dangerous, knowing his uncle, Emperor Franz Josef, had been the subject of an assassination attempt by the Black Hand in 1911.
Just before 10 a.m. on Sunday, the royal couple arrived in Sarajevo by train.
In the front car was Fehim Čurčić, the mayor of Sarajevo and Dr. Gerde, the city's Commissioner of Police.
Franz Ferdinand and Sophie were in the second car with Oskar Potiorek and Lieutenant Colonel Count Franz von Harrach.
The car's top was rolled back in order to allow the crowds a good view of its occupants.Čabrinović, Grabež and Gavrilo Princip, were all suffering from tuberculosis and knew they would not live long and the other four men hated Franz Ferdinand.
They were therefore willing to give their life for what they believed was a great cause: Bosnia and Herzegovina achieving independence from Austro-Hungary.
The six conspirators lined the route.
They were spaced out along the Appel Quay, each one with instructions to try to kill Franz Ferdinand when the royal car reached his position.
The first conspirator on the route to see the royal car was Muhamed Mehmedbašić.
Standing by the Austro-Hungarian Bank, Mehmedbašić lost his nerve and allowed the car to pass without taking action.
Mehmedbašić later said that a policeman was standing behind him and feared he would be arrested before he had a chance to throw his bomb.
At 10:15, when the six-car procession passed the central police station, nineteen-year-old student Nedeljko Čabrinović hurled a hand grenade at the Archduke's car.
The driver accelerated when he saw the object flying towards him, but the bomb had a 10 second delay and exploded under the wheel of the fourth car.
Two of the occupants, Eric von Merizzi and Count Alexander von Boos-Waldeck were seriously wounded.
About a dozen spectators were also hit by bomb shrapnel.
After Čabrinović's bomb missed the Archduke's car, four other conspirators, lost an opportunity to attack because of the heavy crowds and the high speed of the Archduke's car.
To avoid capture, Čabrinović swallowed a cyanide capsule and jumped into the River Miljacka to make sure he died.
The cyanide pill was expired and made him sick, but failed to kill him and the River Miljacka was only deep.
A few seconds later he was hauled out and detained by police.
As he was taken away, he supposedly was heard saying "I am a Serb hero.
"Franz Ferdinand later decided to go to the hospital and visit the victims of Čabrinović's failed bombing attempt.
In order to avoid the city centre, General Oskar Potiorek decided that the royal car should travel straight along the Appel Quay to the Sarajevo Hospital.
However, Potiorek forgot to inform the driver, Leopold Loyka, about this decision.
On the way to the hospital, Loyka took a right turn into Franz Josef Street.
Gavrilo Princip was standing near Moritz Schiller's cafe, when he spotted Franz Ferdinand's car as it drove past, having taken the wrong turn.
After realizing the mistake, the driver put his foot on the brake, and began to reverse the car.
In doing so the engine of the car stalled and the gears locked, giving Princip his opportunity.
Princip stepped forward, drew his pistol (a .380 caliber FN Model 1910), and at a distance of about 1.5 m (five feet), fired twice into the car.
Franz Ferdinand was hit in the neck and Sophie (who instinctively covered Franz's body with her own after the first shot) in the abdomen.
They both died before 11:00. 
In "Stage 1", the player runs along the top of an express train, jumping between carriages while avoiding enemy knives and obstacles.
Halfway along the train, the player enters the train, and "Stage 2" begins.
The player must then proceed through the carriages, towards the front of the train, so that it can be stopped.
Upon the completion of each level, the game displays the Engrish message “Congraturation!
You Sucsess!”.
The game then repeats from Stage 1, with more enemies.
Enemies, known as "redmen" initially pursue from the rear on the roof of the train, and the front once inside, and will throw knives which the player must dodge by ducking under, or jumping over, them.
In addition, once inside the train, the player can jump up and hang from the overhead straps out of the way of the redmen.
However, ghosts flit up and down the carriages making it extremely dangerous to stay there too long.
Once a few levels have been completed, redmen will approach from both front and rear.
The player has only two weapons at his disposal.
When on the roof of the train, he can catch birds that fly overhead and then release them to run along the carriage and knock the redmen off, as well as high kicking them.
Whilst inside, the high kick is the only option. 
A woman calls for help from her window as two burglars climb over the roofs into her house, tie her up and throw her out of the window.
A policeman hears her cries and climbs onto the roof, only to be trapped by the burglars before they make their escape.