My legs are really sore?

Yesterday we had to do weight room at school and do the weight challenge. You have to do all the machine and then divide how much you lift by your weight. He said to really push yourself and we had to finnish as many machines as possible. Every time you do a machine he has to watch you to see if you can really do that many pounds before he puts it on the list. The problem is that he does not always look you have to yell his name ans stuff even when you did a million times. My arms kinda hurt but my leg hurt really bad because i did the leg exercise a million time what can i do to stop the pain?