Aha!
The Big Bang Theory Season 6, Episode 3
No, I think it's stupid.
Aha!
The Big Bang Theory Season 7, Episode 16
Aha. There you go.
Breaking Bad Season 2, Episode 10
Aha!
The Big Bang Theory Season 7, Episode 3
A-ha! You are upset.
The Big Bang Theory Season 10, Episode 20