This happened about 1.5 years ago:
Me: LOOK BEHIND YOU! A 3-HEADED MONKEY!
*Ted and Barry turn around*
Barry: Heyyyy...... there's nothing here......
Ted: *shrugs* Let's just keep staring anyways
*They continue to stare for about a minute until I finally turn them around*
In Ms. Elso-Ponzo's Philosophy Class:
Ms. Elso-Ponzo: Can you really sing Elvis songs?
Michael B: Yes, are you going to make fun of me now?
Ms. Elso-Ponzo: No, no no no. Well, yes.