The last three or four reps is what makes the muscles grow. This area of pain divides a champion from someone who is not a champion. That’s what most people lack, having the guts to go on and just say they’ll go through the pain no matter what happens. I have no fear of fainting. I do squats until I fall over and pass out. So what? It’s not going to kill me. I wake up five minutes later and I’m OK. A lot of other athletes are afraid of this. So they don’t pass out. They don’t go on.