-When you are watching a movie and call your wife into the room and rewind a part of it because there is NO WAY that the scene they showed could really happen.
Case in point, was watching Road Trip the other day, for like the 20th time ( not that great a movie I know..don't ask) and I noticed during this scene they had the snakes jaws taped with scotch tape to prevent it from attacking the mouse. Not as clear as when it's in HD but go to about 24 seconds in and look close ( when the snake lifts it's head there is grass stuck to it's jaw)
http://www.youtube.com/watch?v=o3VJPw5Z3d8