Getting sparked can happen to the best of them – just ask our July cover star. Here's our selection of some of boxing's more memorable KOs:
1 Ike Williams v Beau Jack (1948)
Hard to believe Ike Williams was a lightweight from the punching power on show here (go straight to 5 minutes 50 for the infamous final flurry) - by the end, even he was asking the referee to step in.
2 Sugar Ray Robinson v Gene Fullmer (1957)
The best pound for pound fighter in history say some, Robinson’s left-handed knock down has been dubbed "the perfect punch".
3 George Foreman v Joe Frazier (1973)
The lesser known "Sunshine Showdown" saw the unfancied Foreman knock champion and Ali-conqueror Joe Frazier down no less than six times in one of boxing’s greatest upsets.
4 Thomas Hearns v Roberto Duran (1984)
Duran was a 77-win legend who’d never been knocked out. Hearns put him on the canvas twice in two rounds before an awesome right-hander not so much turned out the lights as cut the mains supply.
5 Mike Tyson v Michael Spinks, (1988)
Tyson in his prime. Champion Michael Spinks had never even been knocked down in his career let alone knocked out. Against the 21-year-old Tyson he lasted just 90 seconds. And then retired.
Frederico Mendez v Paul Ackford (1990)
Possibly the best punch of the lot - 18-year-old schoolboy Mendez, in only his second international, flooring policeman Ackford in what he later claimed was a case of mistaken identity. Watching Ackford being helped from the pitch helps explain why his nickname was Bambi.