Actually, movies have plenty of bugs. You know those things when a movie changes scene and the heroes clothes that were dirty three seconds ago are now mysteriously clean? Or when you see the cameraman flash by in a mirror? Or when you can see the microphone hanging down? Those are the movie version of bugs, although they are called goofs.
Boom in the shot "goof" or whatever you are saying doesn't cause the consumer to have to restart the movie and watch it again.