OK... I watched that about ten times and I am certain that's legit.If you were to ask me, I would say that is impossible. The amount of brute strength it takes to overcome all that friction/suction is amazing.
While it's certainly nothing to take lightly, I'm not sure it's that big of a deal. Not saying I could do it, but he is in the shallow end, 3ft deep, and its really as much about how fast you can get your legs up and balance as it is your vert. Not to take away from the guy, but I think there's a lot of people out there with decent verts and balance that could accomplish it. Also think G3 should give it a shot...
What would make him think to get out of the pool like that? What happen to the conventional climbing out like a regular person? It was definitely impressive but what if he'd missed and hurt himself? George DO NOT try this please!!!!