In Bridge of Spies a spy plane pilot is shot down over Russian airspace. At the start of that sequence the pilot decides to unbuckle his harness, even though he is being jostled around in the cockpit, and the canopy is cracking.
This decision ultimately prevents him from initiating the self destruct sequence. Earlier in the movie there was a briefing that highlighted the critical importance of destroying the aircraft if this exact scenario happened. It was also mentioned as an aside that the pilot would still be able to eject after the self destruct sequence was initiated.
So the question remains... Why would a trained elite pilot remove the safety gear that allows him to stay in the cockpit even if he is jostled around and the canopy breaks? Was it just to add some suspense?