He does this HYSTERICAL impersonation
of Stephen Hawking having phone sex.
The Big Bang Theory Season 2, Episode 11
I think I'm HYSTERICAL.
The Big Bang Theory Season 7, Episode 12
I also have a HYSTERICAL bit
planned for later
The Big Bang Theory Season 5, Episode 24
Hysterical.
The Big Bang Theory Season 4, Episode 20
That's HYSTERICAL.
The Big Bang Theory Season 7, Episode 15