
No, I think it's stupid.
Aha!
The Big Bang Theory Season 7, Episode 16

Aha.
The Big Bang Theory Season 1, Episode 12

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 7, Episode 3

Aha!
The Big Bang Theory Season 6, Episode 3