Fish-Out-of-Water Comedy
Dropping a character into a world whose social rules they don't understand. The comedy, and some insight too, comes from the constant mismatch between them and everyone around them.
Back to the Future Part III
Marty arrives in 1885 wearing 1980s clothes and speaking in 1980s slang. Everyone he meets finds him odd. The mismatch sets up many of the jokes.
True Lies
Helen has lived an ordinary life and is suddenly dragged into Harry's world of spies and guns. She does not understand its rules, and the mismatch is funny. It also shows how much she has been shut out of his life.

