Didn't read all of the replies, but Pettis/Henderson by a mile.
For me, I'd have to say when Lesnar punched Herring in that first round, broke his orbital bone, and sent him tumbling ass-over-backwards.
I'd never seen anybody fly back like that from a punch.
It's really too bad Brock 1) got sick and 2) never trained with a good camp that could have trained the fear of getting punched out of him. He had mad potential.
Wandy's face plant against Tito.
Okay, but TS said "greatest" not necessarily "hardest". Out of pure power, Pettis/Henderson isn't the best, but when you add aesthetics into it, I think it qualifies.
lol Roy protects his belly over face
Condit does indeed have a good chin, but it looks like he's expecting this one and rolls with it right before it lands.
Funny thing is. It's the same combo Hendo used to send Bisping into la-la land. It looks to hit 100% here too. The difference is just the chin.
Anderson Silva landed the facekick against Dan Henderson, which Steven Seagal taught him before the Belfort fight.
Seegal tought him so well that he landed it before the UFC too.