<human>: Can you give me the gist of the text in a nutshell?

Not today, but a memory from back in 9th grade. 

It's the very end of the day, and I haven't peed all day. I think to myself, "Oh, I'll just wait until the class ends." 20 minutes later, I have to go BAD. "Ok, ok, I'll just ask when the professor stops talking." NOPE. This guy wouldn't shut the fuck up. Right then and there it started. I just couldn't hold it in. Urine was pouring out of my shorts. Half way through, the professor noticed me and I stuttered, "C-ccan I go to the bathroom?" "Uhhh sure." Class is totally silent, all staring at me. Run to the bathroom, piss everywhere. End up changing into my P.E uniform. When I come back in, I announce, "Don't worry, it was just water!" While carrying my empty water bottle. The kid sitting next to now exclaims, "THEN WHY IS IT YELLOW, DUMBASS?" Entire class laughs, proceeds to tell majority of high school. I ended up switching schools the next week.
<bot>: Had to go to the bathroom, professor won't shut up, piss pants, try to tell everyone it's water. Kid sitting next to me proves me wrong. High schoolers are cruel.