I recently saw Carlsen-Morozevich, 2012 Blitz championship. It's not the craziest imbalance I've ever seen, but it was certainly one of the most fascinating games I've seen. Here's a link to the youtube video of the game:
http://www.youtube.com/watch?v=-wRdgOllrzM
Tell me, what is the craziest imbalance you have ever been in or the craziest imbalance you can think of.
My own example would have to be 2 pieces and 3 pawns for a queen.
The craziest I can think of would have to be... A rook, and a queen vs. 4 minor pieces and 2 pawns.