I experimented with the Halloween Gambit in blitz on ICC. It's surprisingly good considering White trades a knight for a pawn. Here is an awesome position I had by move 16:
Black to move.
Can you find the forced mate? This one shouldn't be hard.
What this position shows is first of all, poor play and second of all: the power of the opening. Black retreated his knights to b8 and g8. After that, he desperately tried to uncork his position. Meanwhile, White developed naturally and had his army ready for action.