World Trade Center's Order

Alright, listen up, you big ol' dummy. This one's pretty dark, even for me, Explain Bear, but you asked for it. You see, the World Trade Center, those big towers in New York, were tragically hit by two airplanes on September 11, 2001. That was a really, really bad day. Now, Domino's Pizza is a place where you order stuff, usually 'two large' pizzas, right? The 'joke' makes a super grim pun by saying the World Trade Center 'ordered two large planes' from Domino's, playing on the word 'large' and the delivery concept. It's messed up, because it makes light of a horrific event. Your brain clearly needed a strong cup of coffee for this one, you slowpoke!