Hilarious '21 Jump Street' shouldn't work, but it does

Pickles and ice cream. Bacon and cupcakes. Chocolate and potato chips. Channing Tatum and Jonah Hill. Some pairings shouldn't work, yet somehow the result is delicious – and in 21 Jump Street's case it's a hilarious surprise.

There are so many reasons this buddy comedy shouldn't work, but it earns an A in practically every subject.