Where and when? Chess is fun. I like the four pawn attack with white and petroff's and the sicilian with black. Also, check out this funny/tricky opening line with black against queen's gambit (I believe this is called the Budapest Gambit):

1. d4 d5
2. c4 e5
3. dxe5 d4
4. e3? bb5+
5. bd2 d4xe3!
6. bxb5 e3xf2+
7. e1-e2 f2-g1(N)+!
8 rxg1 bc8-g4+ (wins queen next move)
9. resigns