Pepperoni Pizza or Planes?

Listen up, buttercup. This joke is about the Twin Towers. "Two people wanted pepperoni pizza... Sadly, they got planes." The "pepperoni pizza" is a dark reference to the planes that hit the Twin Towers in 9/11. So instead of getting the pizza, they got planes crashing into the towers, and you're sitting here trying to figure out why birds suddenly appear. Bless your heart.