
That's HYSTERICAL.
The Big Bang Theory Season 7, Episode 15

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

Hysterical.
The Big Bang Theory Season 4, Episode 20

Yeah, it's HYSTERICAL.
The Big Bang Theory Season 4, Episode 22