Yeah, I have a safety squat bar and if used properly it is much more difficult than a straight bar squat, because the bar throws you forward and causes you to work your back extra hard. At least, that's when you use it while holding the yokes or freehanded (I only box squat).
I've done the free squats "Hatfield" style, where you hold onto the uprights and find that
A) your balance is considerably improved, making the lift easier
B) you can lean back more, enabling a much easier lift
and most importantly,
C) I can use about 250 more pounds than normal with the SS Bar if I hold onto/pull myself up with the power cage.
Tiki's strong, but that half-assed safety squat is not an impressive lift by any means. Plus the sled-running is stupid. He'd be far better off with training under someone else, but these guys get away with being genetic freaks. Instead of doing cheat squats, leg presses and sled runs he should be doing box/power squats, GHR, and plyo's or sled DRAGGING. The only thing good I see is the snatch grip DLs, but he's using 315 which is probably much more indicative of his actual strength. He's probably a 500lb squatter. The hype machine's cogs are in motion.