Not that I’m biased but I do agree with this particular review of Groover’s first ever stage production (with lines and everything) – Arsenic and Old Lace:
Within this set we meet Joseph Kesselring’s bizarre characters, all of whom are presented by well-chosen actors, but one must say that the standout character of Teddy Brewster/Roosevelt is played in a manic, no-holds-barred fashion by Groover. He brings a new dimension to the term ’barking mad’.
Einstein: My how I’ve changed…
Teddy: Well, you see, that picture hasn’t even been taken yet…
A classic moment.
Teddy: I’m President Roosevelt.
Mortimer: Good news Mr President, your term of office is over.
Teddy: It’s out of my hands. He’ll have to be told. Army regulations you know.
Teddy: So that’s it, a nature faker!