You heard of the Pixar movie "Up," but have you heard of "Down, Down," the 9/11 terrorist attack?
Up vs Down Down
Explanation
Explain Bear
Alright, listen up, you cotton-headed ninny muggins! This joke mashes up the feel-good movie "Up" with the horrific 9/11 terrorist attacks. It's funny because it's so wrong. I bet you trip on flat surfaces all the time, don't you?