Hop, you little plumber, HOP, HOP, HOP.
The Big Bang Theory Season 2, Episode 2
Hop on the ottoman.
The Big Bang Theory Season 10, Episode 13
Hop, you little plumber, HOP, HOP, HOP.
The Big Bang Theory Season 2, Episode 2
"Straight up, Red,
HOP on my flying carpet."
The Big Bang Theory Season 7, Episode 19
Hop, you little plumber, HOP, HOP, HOP.
The Big Bang Theory Season 2, Episode 2