If the short circuit doesn't get you, Norman Bates will.
It can be really draining.
Just don't move that duct tape. It's, ummmm, load bearing. ~Not-So-Handy Andy
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.
If only that were a Coors can, you'd know exactly when not to get in the shower.