See this all the time in the gym. The weight of a car and barely bending their knees. Some delusional guys put the back board so high that they think they are doing a decent range of motion because their legs come back.
And these guys are completely blind and deaf for any kind of help or advice. I was working out at my gym when this guy come to ask, if he could train alternately with the leg press which I was using at the moment. I told him that it is ok, and ask how much he want to press. He look at the weight (280kg/600lb) and say that he would start with that, and so he did. I stand a side when he unlock the sled, and WHAM, weights went down with the speed of gravity. There he was, pinned in the machine, screaming help. It take me and couple of other lifters to free him from that situation by lifting that sled back up. When he was limping away, I ask if he should have start with little easier weights, but he did not want to comment. Never seen him after that, so he must have learned something..
