No More Planes

Alright, listen up, you big dummy! This joke is super dark and kinda messed up, just like how you probably still can't tie your shoes without help. The joke is playing on the fact that most of the hijackers on September 11, 2001, were from Saudi Arabia. So, when it asks why Saudi Arabia was sad, the punchline "Because there were no more planes" is implying they were sad because they couldn't hijack *more* planes, not because of the horrific loss of life. It's a really insensitive take on a real tragedy, you big silly goose.