At the very end of the move Harvey opens a door and the words at the bottom of the screen say.
"Harvey as Himself."
This line from Elwood is great, also counts as a moment of awesome.
Elwood: Well, I've wrestled with reality for 35 years, Doctor, and I'm happy to state I finally won out over it.
Veta is almost as funny as Elwood, just read this quote.
Veta: Oh good! Nobody here but people.
There's one scene where Veta and Dr. Chumley are trying to locate Elwood. Elwood calls them asking if Harvey is there with them. They tell him Harvey is in the bath tub. Their plan fails when Elwood 'bumps into Harvey' on his own. These lines will make you laugh every time.
Elwood: Oh nevermind Veta, here comes Harvey now. Oh, you better see who that is in the bath tub.
Veta: Oh Myrtle Mae! Find out who the stranger in the bath tub is!...
It's quick, but Dr. Sanderson's failed attempt at an Armor-Piercing Question stands out since those work 99% of the time.
Dr. Sanderson: Mr. Elwood...what was your father's name?