He's an EXPERIMENTAL physicist.
The Big Bang Theory Season 6, Episode 5
But as a practical matter, need I remind you
it takes EXPERIMENTAL pharmaceuticals...
The Big Bang Theory Season 1, Episode 15
So if you are considering
going into EXPERIMENTAL physics...
The Big Bang Theory Season 2, Episode 6
Experimental log.
The Big Bang Theory Season 6, Episode 8
And they're all hopped up
on EXPERIMENTAL steroids.
The Big Bang Theory Season 2, Episode 16