
(BOTH CHUCKLE)
The Big Bang Theory Season 4, Episode 18

There's the friendly
CHUCKLE.
The Big Bang Theory Season 7, Episode 7

(RAJ AND BERNADETTE CHUCKLE)
The Big Bang Theory Season 10, Episode 13

- What makes you CHUCKLE, Leonard?
- Um, recently? Not much.
The Big Bang Theory Season 4, Episode 5
![[both chuckle]
[both chuckle]](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
[both CHUCKLE]
The Big Bang Theory Season 12, Episode 2