I remember it well, I was sitting there saying, "oh I fancy Buckland here lads, Smith won't handle this....." Bang! Brilliant uppercut.
Froch bent-legged KO of Groves was the best I've seen live. One of my favourite on-punch KOs in a British ring though has to be Khomitsky on Etches: This content is protected A proper "tiiimmmbbeeer" knockout. Also I remember this was one of the final fights where it became apparent that Jim Watt was finished as a commentator because he genuinely started saying that this was a premature stoppage! Nick Halling had to tell him straight that there was serious concern over Etches wellbeing.
Potvekin v Whyte for me I don't remember Potvekin landing too much of any significance to Whyte's head and then what happened happened.
I know everybody hates him, but Wilder has some corkers. Martinez vs paul williams springs to mind marquez vs pac
The best one I saw live was non puncher Wally Swift flattening Ensley Bingham. Another was Borehamwood's Johnny Ridgeman icing my gym mate Peter Foster. I didn't actually see the shot, it was that quick. Sadly, neither did Peter !
George groves being knocked out cold in front of 85,000 people at Wembley and falling on his own leg. The pinnacle of one punch KO losses in a British ring. HoF worthy.