
Little snarky there,
Cello Lessons.
The Big Bang Theory Season 5, Episode 12

clearly you've never
seen me play the CELLO.
The Big Bang Theory Season 7, Episode 6

I guess he forgot that
I play the CELLO.
The Big Bang Theory Season 11, Episode 13

Leonard, I didn't know
you played the CELLO.
The Big Bang Theory Season 1, Episode 5

How do you meet girls playing the CELLO?
The Big Bang Theory Season 6, Episode 18