Question: Generate a question about the following movie plot: BLACK FRIDAY-synopsis Dr. Ernest Sovac (Boris Karloff) is being led to his execution in prison. Entering the viewing room, he gives his notes to a newspaper reporter (James Craig), telling him that his newspaper was the only one who treated him fairly. The reporter opens it and begins reading. From here we go back to flashback until the end.Prof. George Kingsley is teaching at Newcastle University. As class concludes, he announces that he may be taking a job at a major university next year. Jean Sovac (Anne Gwynne) talks to him and escorts him outside to a car driven by her father, Ernst, who is talking to Georges wife Margaret (Virginia Brissac) about her husbands interview with the university. They all go downtown where Kingsley asks to stop off for something forgotten. As he crosses the street, he is run down by two cars driven by gangsters Red Cannon (Stanley Ridges), Marnay (Bela Lugosi), Kane (Paul Fix), Devore (Raymond Bailey) and Miller (Edmund MacDonald) who are chasing each other. They crash into the building where George was going and he is knocked unconscious along with Cannon.At the hospital Dr. Sovac attends to both men. Kingsley has sustained brain damage while Cannon is paralyzed from the waist down. Sovac talks to Cannon, who promises to reward him if he helps him recover. Knowing that $500,000 is hidden somewhere by the gangster, Sovac agrees to help him. That night he performs a brain transplant: Cannons brain into Kingsleys body. When the police view the body of Cannon, now covered with a sheet, Dr. Sovac tells them the head wound along with a severed spine was the cause of death. Kingsley recovers.Sovac talks Kingsley into going to New York for a change of pace (Sovac is hoping to find out where the money is hidden so he can build his own clinic). They go to New York and check into the Midtown Hotel in the same suite Red Cannon used to hide out in. Kingsley seems to remember it but doesnt know why. Checking into the rooms, the bellhop remarks how the gangster formerly occupied this room...
Answer:
What has the gangster hidden?