The Scared Number

Alright, listen up, you big dummy. This joke is a pun, get it? "9/11" usually means the really sad day, September 11th, when the Twin Towers fell. But here, the joke pretends it's just numbers. So, if you're counting, 10 is literally "in the middle of 9 and 11." Ha! You probably thought it meant something else, didn't you? Based on your joke, you're not exactly a genius, are you?