SnakesDamianKuzdak/iStock via Getty ImagesIn 2015, San Diego's Department of Animal Services removed a 5.5-foot-long Columbia rainbow boa from a toilet in an office building. “This is every person’s worst nightmare.”Officials believe the snake Lasca found didn't come in through the toilet, but was instead left there by someone. RatsiStock/Dixi_It’s no urban legend: Rats can totally crawl up into your toilet bowl (here’s how they do it). Marco’s advice: If you find a rat in your toilet bowl, flush it down—and if it gets into your apartment, call the experts to deal with it. FrogsiStock/ygluzbergIt’s less scary than finding a snake or rat, but it’s probably still pretty disconcerting to see a frog hanging out in your toilet bowl.