Matty Blast

Revealing mistake: When young Andy Kauffman is performing the "Animal Song" for his sister, he mouths the words "Meow meow" along with her. Although one could argue that he was expecting her to say that, how would he know she was going to say the word "meow" twice?

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Factual error: Although tall glasses of milk look better, the milk that was given to the audience members of the Carnegie Hall performance came in 1/2-pint paper cartons.

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Continuity mistake: When Lawler smacked Carrey off his chair in the David Letterman scene, the hit was so hard that it made Carrey's mouth bleed (you have to look very carefully). When he stands up and is shown close up again, the blood is gone. (Incidentally, the reason Lawler hit him so hard was that Carrey constantly stayed in character throughout filming, and taunted him relentlessly. Lawler decided he'd had enough.)

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Trivia: During filming, nobody was allowed to call Jim Carrey by his real name. Whether the camera was rolling or not, Carrey stayed in character, and everyone was instructed to address him as "Andy."

Matty Blast