Ernie runs a wrecking crane for a demolition company in Hillwood. He's knocked down about 500 buildings, and keeps a piece of each one in his room as a souvenir. He has a metal plate in his head. Ernie playing some miniature sort of Sousaphone (either that, or a very oddly-shaped tuba) in a flashback in "The Journal", and he plays an accordion (at Blockapalooza) in the movie, and many other episodes (e.g. "Arnold as Cupid").
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