Poll Suggestion: Losing Control of Oneself

Whenever Curly Howard, one of the most hilarious members of the legendary The 3 Stooges, heard the tune "Pop Goes the Weasel" he would completely lose control over himself and start knocking out everyone around and — occasionally — even himself!

Here you can watch the above-mentioned slapstick, a memorable moment in television: Curly Goes Berserk Over "Pop Goes the Weasel"

Now follows a list of movies/episodes where:

• somebody suddenly loses control over the whole self or over a part (or extension) of his/her body

OR

• a part (or extension) of the body mysteriously acquires its own will (e.g. the hand tries to kill its owner).

Which movie is the most incredible?

https://www.imdb.com/list/ls089742740/