Instances of head-butting in movies

Inspired by the current SD feature article, how many instances of head-butting can we come up with from the wonderful world of movies? First time I can recall seeing that manuever in a movie was in the Commitments. Then there’s Red Eye (which is mentioned in the article). How many more head-butts have occurred?

Here is a recent thread on the subject; some of the examples given there ended up in the Staff Report.