I had a friend who had a janitorial position. Cleaning a particularly stubborn toilet and dumped a bunch of bleach into the bowl. His coworker came in behind him and proceeded to piss in said boil, creating a toxic miasma that forced them to exit the restroom quickly and heavily ventilate it before returning.

Lol, I’ve done that before in my apartment. Guessing it’s the same thing as an ammonia-bleach reaction.