I've been rocked by a shot once in my 2 odd years of boxing...

Always had a pretty tight defence and a good chin...

JonesJrMayweather's reminded me of something... when I was a kid I jumped off a sofa and landed chin first on my mate's head with my mouth wide open.... so thats 100% of my body weight multiplyed by how ever fast I was traveling on the jaw...

It shattered 2 of my molars but that was all (whimpers... :P) when/if I ever go down it will be from a body shot...

Horrible things.