greatest one-punch KOs ever...

[portuge puncher]

it would have to be when marciano put walcott to sleep.

even tho its old fotage, it still looks so violent.

[F l i c k e r]

Robinson-Fullmer 2
Foster-Tiger
Marciano-Walcott 1
Weaver-Tate
Nunn-Kalambay
Rahman-Lewis 1
Lewis-Rahman 2 (one punch KO, the left hook missed)
M. Spinks-M. Johnson

I agree with these... to add a couple of my own.

Hopkins-Oscar (body shot)
Kotsya-Judah
Bailey-Figueroa
Tyson Fury-Tyson Fury (It wasn't a KO, but it was an epic fail/pwned)

[Gojira]

Sprott v Harrison