The "I Can Never Decide If It's Parody Or Satire" Award

From 'Airplane!', one of the more well-crafted scenes in comediocinematic history.  When he hangs his head at the end really caps it off.

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There's One In Every Crowd Ten Billion People

In Steve Martin's 'Sgt. Bilko' there was one tiny, quick scene that was one of the cleverest 'quickie' sketches I'd ever seen.  Maybe it wasn't new, but it was to me.  It's just such a bizarre thing for someone to do.  Something no one, no matter how certifiably moronic they were, would be capable of doing.  The mind balks at the very thought.

Unless, of course, it's the mind of Sgt. Bilko.

Here's a longer clip as Bilko first helps a young solder, then learns how to play poker (edited for time).

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Bill Shatner, Move Over

Always a favorite, here's Jim Carrey doing a few impersonations in Ace Ventura: Pet Detective.

From the same movie, this classic.

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When He Was Great Dept.

OJ's great scene in Naked Gun.

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Their Sincerity Shows Through

I guess the thing that so many people liked about the old Monty Python skits was how sincere they were.  No matter how flat-out ridiculous the situation, they never treated it lightly.  No better example could be found than the wall-painting scene in Life Of Brian.