seeing oblivion doing the first parkour and realism replays is what got me into this game, the period of time after that all the way up until 2016-17 with everyone innovating in the replaymaking game is the most memorable period for me. I think oblivion's self spar is what most excited me at the time, and if I had to pick a particular moment it's the KO for sure, where he throws the opponent up into the air and punches them on landing

there's of course a lot of other stuff that happened while I was learning replaymaking that's very notable but that one moment symbolizes it pretty well
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and while I'm talking about iconic replaymaking moments I gotta mention nuthug, maybe the rayman replay