Back when I was about 14, I did some really hard cardio in the school gym. It went on for 1 whole hour and we were only permitted a 1 minute break at the end of 1 set of 6-7 workouts. After that, I had English class on the second floor of my school. Climbing those sets of stairs was fu[i]c[/i]kin painful as shit. I had to grip the railing with both hands to stop myself from falling. [spoiler]My second most painful experience is looking back on all the twelvie cringe shit that I used to be into back when I was 13. Never again.[/spoiler]