Watch Pee-wee Herman's Halloween appearances on David Letterman (1983 and 1984)

Pee-wee's sage trick-or-treating advice: "Don't eat any apples you can shave with."

(/r/obscuremedia, thanks UPSO!)

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Learn how to make an entrance the Bill Murray way

Watch one of the most exciting late-night talk show entrances in television history (I'm guessing)!