(When Jeremiah spills the banana split over Wesley everybody starts laughing.)
Data: I-I fail to understand why this is amusing.
Riker: Access your databanks under "humor," subheading "slapstick."
Data: Comedy stressing farce and horseplay. This, no doubt, is a variation on "pie in the face."
Riker: Now do you see why it's funny?
Data: No, sir. But I will take your word for it. This is very amusing.