He wasn't INSANE.
The Big Bang Theory Season 11, Episode 8
right now would be
literally INSANE.
The Big Bang Theory Season 7, Episode 13
...so I'm gonna do something INSANE
in the hopes that you'll call 911."
The Big Bang Theory Season 4, Episode 9
"and his INSANE belief
that the Ghost Rider movie
The Big Bang Theory Season 9, Episode 18
Are you INSANE?
The Big Bang Theory Season 1, Episode 2