It was a little high, it did come up easy but that doesn't mean that he could have gone lower and got it up, he could have gone heavier and still got it up but not necessarily lower. If your glutes and hamstrings arent strong enough to get you out of a lower depth it doesn't matter how strong your quads are. Not saying he couldn't do it, just the reasoning of how easily he got 500 equating to him being able to go deeper doesn't go hand in hand.