Please answer the following question about this movie plot. If it's un-answerable, please output "No answer". Question: What does Bazda step on that alerts Burnett he is being followed? Movie plot title: Behind Enemy Lines Movie plot: As the war in Bosnia comes to an end, the USS Carl Vinson (CVN-70), under the command of Admiral Leslie Reigart (Gene Hackman), that is stationed in the Adriatic Sea, along with the rest of the NATO forces in Bosnia, are preparing to withdraw. However, Flight Navigator Lieutenant Chris Burnett (Owen Wilson), and Pilot Lieutenant Jeremy Stackhouse (Gabriel Macht) are assigned a reconnaissance mission over Bosnia. During the reconnaissance mission, they spot suspicious activity in the no-fly zone that NATO aircraft are prohibited from entering. Burnett persuades Stackhouse to fly their F/A-18F Super Hornet off-course to get a close look on the target and they take photographs of the area. However, both men do not realize that they photographed mass graves, and Serbs in the area spot the jet. The local Bosnian Serb Army commander, General Miroslav Lokar (Olek Krupa), is involved in a secret genocidal campaign against the local Muslim population. Not wanting the mass graves to be discovered, Lokar orders the plane to be shot down.Despite trying to outmaneuver the missiles shot at them, their aircraft is hit and they are forced to eject. Both Burnett and Stackhouse parachute into Serb-held territory along the Bosnia-Serbia border, with the latter being injured. Burnett goes to higher ground to contact Reigart for help. Stackhouse, however, is captured by a Serb patrol under Lokar's command. As Lokar interrogates him, Stackhouse insists that he was on a solo mission. As the Serb patrol moves on, Stackhouse is deliberately executed by one of Lokar's right-hand men and, apparently, his personal assassin, Sasha (Vladimir Mashkov). Burnett, who noticed the Serb patrol and was observing their interrogation of Stackhouse, involuntarilly screams in horror, alerting the Serbs to his location. Wanting Burnett dead as well, Lokar sends his second in command, Colonel Bazda (Marko Igonda), and Sasha to find him.Burnett contacts Reigart on high ground to inform him of what happened. Reigart orders Burnett to move to a certain...
on a landmine