Where’s the best spot to punch someone in a fight ?

Answer 1

Offer your opponent a cigarette, when he opens his mouth, bring your fist up quickly (uppercut) under his chin. Hit him hard enough and you'll break his jaw. Fight over.

Answer 2

Only thing I know is to punch a chubby guy in the face. 

I don't mean that cruelly. I like chubby guys.

Answer 3

Probably on the side of the head.  If you have a strong swing, you can knock him out, flat.

Answer 4

Well last time I was at the grocery store buying masks to go watch the sequel to Avatar and then this guy come up to me, his name was Neo from matrix, and he said I'm a fool so I punch the watermelon and the seeds went to his eye and now he has double vision because I eated the seeds when my belly grows like a tree. It was a good day.

Answer 5

in their mouth with a FIST of rings!