Alvarado may not have had to put any weight on his back — but we don't doubt he felt like this by the end.

For one student at Lone Star College-CyFair, showing up 15 minutes late to class led to nine days in the hospital.

When Marciel Alvarado waltzed in late to his intro-level phys-ed class, the instructor, Chris Rousseau, decided that making him do squats for 35 minutes straight was an appropriate punishment — with no water breaks allowed, according to a lawsuit against the school, as first reported by ABC News.

Alvarado obeyed because he was worried about his grades and because he's a guy who respects authority, his attorney, Michael Martinez, told the Houston Press. So Alvarado actually did squats for 35 straight minutes. He left the class waddling awkwardly. Within 24 hours, Alvarado's pee was the color of Coca-Cola and he was writhing in pain in the emergency room. It was because muscles were literally self-destructing.