Related Clues:

• 'This is Spinal Tap,' e.g
• Many a true word is spoken in this
• Amusing satire, like a Wayans film
• Silly prank
• Mad act done for fun
• Class clown's bit
• Marx Brothers shenanigan
• Bit of foolishness
• "Saturday Night Live" skit, often
• Mad bit
• Bit of nuttiness
• Do some leg-pulling
• Tricky thing, being contra the speed of light
• 'Scary Movie,' for one
• Three Stooges bit