The Best Practical Joke I Know Of Is From MASH.

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The best practical joke I know of is from MASH. However, you need a reputation
as an incorrigable joker for it to work. Just let the person know you are
going to play a big one on him within 5 days. (Pick your time frame.) And
that he will be powerless to stop you. If you do it right, he'll worry himself
to pieces and make a fool of himself. Then DO NOTHING.

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