when u get hit in the side, it's necessarily a live shot, it's just getting punched in a vulerable area, hard to breathe when that happens, but if u are going down from it then you just want to get out of the fight. of those body shots in the highlight video, only roy jones' was what people call a ko body shot, he broke the dude's ribs
in the case of lesnar, that was simply a middle kick and it was not a strong one, the knees were strong and had good form, but they did not hurt all that much either... lesnar just wanted to get paid and get out
watch his post fight interview, he is not hurt at all, he's just a pro wrestler playing games with a fighter who dont play games lol, i knew it was going to be brutal and embarrassing because overeem holds back never, he lets you come at him and when he figures you out he starts to take the risk of punching you, he is on the level of jose aldo, a good fighter, which is rare these days