I've been to that World Gym, I think. Just near the highway. Big fences open to the outside. Jay C, Silvio, and some other pro's were there last year for a physique / beach body contest last year in August...
Plus, that Onn's wearing a Chargers shirt and the guy spotting has a World Gym San Diego shirt on might have lent a clue or two... LOL
Aside from the incredible strength, what's impressive about that is the amt. of endurance he has. Most of the time when monstrously strong guys like that are banging out reps, they hit a wall and drop off like rocks in a pond. He just keeps going and can actually pause to crank out a few more.
Also, he's still got some breath when he's done.
Unbelievable.
-R