My partner and I have both experienced going starry pretty regularly, neither one of us has ever passed out but having the vision go all black happens a lot. It's usually only when you're near your max, and when there's a bit of fatigue. We both lift pretty heavy though, his max is 650, mine is 565. We also lift at a gym where we cannot drop the weights, we have to set them down. I've talked about it with him and we both agree, you have to hold your breath to handle that kind of weight, or at least, the both of us do. If we were 800 lb pullers it might be a different story, at those weights anyway.