A real dark horse that nobody seems to know;
Shakes the Clown.
The rental pays for itself in laughs before the opening credits have even run.
Who can deny the casting genius of Florence Henderson as an over-the-hill Clown Groupie?
Best in Show anyone?
Clerks, definitly.
too many others to list, but lots of good ones here already...

Axioms; For when you've just Gotta have More Cowbell! 60s 150 350 8s 2is RX-V2500 DVD-C750 2900