Why is The Joker laughing when he falls off the building in The Dark Knight (2008 film)?
The Joker laughs most when he gets an unexpected result to his “experiments” in human nature. We see him as a bankrobbing criminal, but his main character purpose is to make Batman push his human limits and make him totally bonkers. So it is hard to say which of you is right. He seemed to be laughing because he thought he pushed Batman over his limit. Throughout The Dark Knight he explained his purposes of not being just a murdering bankrobbing psychopath, but more just a potstirring mischievous Joker. So he is never afraid to die. So your buddy seems to be more right for that situation that he wouldn’t let him die even though he would love to have him dead.