He does this HYSTERICAL impersonation
of Stephen Hawking having phone sex.
The Big Bang Theory Season 2, Episode 11
I also have a HYSTERICAL bit
planned for later
The Big Bang Theory Season 5, Episode 24
I think I'm HYSTERICAL.
The Big Bang Theory Season 7, Episode 12
Yeah, it's HYSTERICAL.
The Big Bang Theory Season 4, Episode 22
Hysterical.
The Big Bang Theory Season 4, Episode 20