Brock Lesnar F5'ing the Big Show has probably been the most Holy Shit moment for me at Survivor Series of 2002. Goldberg Jackhammering the Giant was amazing too. Hell pretty much anyone ragdolling the Big Show amazes me. John Cena is a beast too as far as strength. I think the FU is pretty weak as a finisher, but to lift a 400 pound plus man on your shoulders is damn impressive. If you think it's easy, look at Lashley struggle at D2D last year and then watch the ease of guys like Lesnar and Cena.
But Cena being able to semi-suplex and toss the big show, plus to hit the F5 and spin the fucker, that's sick. Brock Lesnar was a legit freak of nature.
Batista also gets a nod. The sheer strength of the ring popping his back muscle when he tries to land flat in the ring is amazing.