My son and I use the ahhhh-haaaa all the time. I love that exchange George has with Jerry that leads up to the ahhhh-haaaa.
GEORGE: Ye - yeah. And we had a pact, you know.
JERRY: What?
GEORGE: You shook my hand in that coffee shop.
JERRY: You’re still with the pact?
GEORGE: Mmm-hmm. You reneged.
JERRY: All I did was shake your hand.
GEORGE: Ah-ha!