Iskenos, u gotta get an opportunity to do a proper suplex, I usually use it when my opponent is above me. Also, don't rotate chest while doing it, keep it in a stable position. Keep in mind, it is a very risky move, but effective when done properly, good luck dude!
ps; watch the first replay, its a proper suplex attempt, but i bailed and setup a hip throw.
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I got some nice replays earlier, forgot to post em yesterday lol