what's your favorite knockout of all time?

i never watched the fight, but read about it. rocky marciano vs. ezzard charles. forgive my sketchiness, but it's like the 5th or 6th round, rock was down already in the fight, i think more than once, and losing on the cards completely. gets back to the corner and is bleeding really bad from the nose. the cut doctor told him he had to call the fight, there was too much blood, and rocky asked for one more round, and reluctantly the doc said okay, but he told rock that after the next round the fight was over. so rocky goes out and puts charles down 3 times in that round en route to a knockout victory. i love rocky marciano, the best ever in my book. but that was just so damn cool to hear. when you want it bad enough, you can do anything.