I've been tagged a few times by young ones and once by a large adult female. A few weeks back, I put a live rat in with an adult female and after a little while, when she didn't eat I went to pull the rat out. The rat was running around the water bowl, so I put my hand in the tub to block the path of the rat while I reached in with my other hand to grab the rat. The blocking hand was bit. I jumped about three feet into the air because I was not expecting it.
It was my own fault. I smelled like rat and put my warm and toasty hand into the tub without even looking to see where the snake was sitting. It didn't hurt that much when it happened but did bleed quite a lot. Now, if I have to pull a rat out of a snake rack, I use padded tongs to get a hold on the base of the rat's tail, then quickly pull them out - while keeping an eye on the snake.