The problem is they don't bite and release. If you get bit, then they thought you were food. They latch down and start grinding the fangs into you. You have to run them under hot water until they let you go. It still shouldn't take nearly as long as that guy let it chew, but odds are it'll still be long enogh to cause swelling.

I wouldn't worry about it. It's pretty hard to get bit unless you are doing something stupid while feeding. Use tongs or place the food on the cage floor, and don't play with them when there are mice around and you'll be fine.