In Bye Bye Birdie, Conrad comes to Sweet Apple and sings "You've Gotta be Sincere" At the end of the song, everyone in the scene has fainted. But as the camera rolls across the set, there is a waterfountain. A little left of the fountain - you may have to watch this spot for a little bit- a boy starts to get up from the fainting position. Realizing nobody else is up, he quickly falls back down. The editors should have seen this and done a reshoot of that part of the scene.