After the Toilet of Terror earlier this week, it seems like the infection is spreading to thrones throughout the world. Someone's either really eager to get rid of their waste, or this is the world's smallest jacuzzi.
Submitter TurboJens explains this fix: The fill valve split in half and the floater does not cut off the water supply. The towel keeps the water inside and the wrench keeps it from overflowing.
As you can tell by the floor, it's already eroded the tiles. Maybe they need to go back to diapers.
So That's why mop water is always so gross. I now severely regret that time I had a taste. ~Not-So-Handy Andy