answer the door or should I
open it and say "AHA" again?
The Big Bang Theory Season 7, Episode 2
Aha!
The Big Bang Theory Season 6, Episode 3
Aha.
The Big Bang Theory Season 5, Episode 4
A-ha! You are upset.
The Big Bang Theory Season 10, Episode 20
Aha! So I am working with you?
The Big Bang Theory Season 3, Episode 4