Let's play a super rare but very fun opening called the halloween gambit.
It happens after e4, e5, nf3, nc6, nc3, nf6 (the four knights game), then nxe5. It's a lot of fun and I love playing it because I'm 900 and I'm pretty sure no one below 1600 will have studied the halloween gambit and know how to play it. So I just play it against unsuspecting 900 rated players and make them cry. It's great fun.
FEN:
r1bqkb1r/pppp1ppp/2n2n2/4N3/4P3/2N5/PPPP1PPP/R1BQKB1R b KQkq - 0 4