Flush the toilet? (Off the subject of snakes in the toilet.)
Someplace on the internet, probably you tube, there is a short video of a toilet bowl, with the seat down, then comes the flush, and you see a spider running on top of the water!
When the flush ends, the spider runs back up the inside of the bowl and hides underneath the seat! That, ladies and gentlemen, in addition to growing up using out houses, where black widows love to congregate, is why I look inside toilet bowls before I sit down!