I had one who was “fat”. In gymnastics he got challenged by one of the sporty guys he always had do the exercise in front of the class so we would know how to do it. The sporty guy basically told him he wouldn’t do it and since no one else was around to show, we could play a game or something like that (it’s been a while). We regretted that. Our ~140kg gym teacher started another routine a lot more advanced and executed it brilliantly. We spend the next few lessons training that shit. He also wasn’t challenged anymore…..