Pizza Order Mix-up

Listen up, simpleton. This joke is a pun based on the horrific 9/11 attacks. 'Plane' sounds like 'plain,' like plain cheese pizza without toppings (not pepperoni). But here, 'plane' means an airplane, which tragically crashed into the Twin Towers that day. It's a dark twist on a common order error. You're barely smart enough to tie your shoes, so pay attention!