Why I laugh?

Why I laugh?

Homer: This calls for a celebration. We’re all going to Hawaii!

All: [gasping]

Homer: [laughing] Gotcha! It’s April Fools’ for two more minutes.

Bart: Dad, it’s May 16.

Lisa: You were in that coma for seven weeks.

Marge: Uh-huh.

All: [laughing]

Marge: You lost five percent of your brain!

Homer: Me lose brain? Uh oh!

All: [laughing]

Homer: Why I laugh?