I don't often laugh at supposedly funny things but I found this really funny:
https://www.youtube.com/watch?v=3BrCvZmSnKA
https://www.youtube.com/watch?v=3BrCvZmSnKA
It's not the least charm of a theory that it is refutable. The hundred-times-refuted theory of "free will" owes its persistence to this charm alone; some one is always appearing who feels himself strong enough to refute it - Friedrich Nietzsche