My worst so far has been from a 6 ft female boa. I had a near miss with my burm but both cases were my fault.
For the most part most of the bites I have taken it was a bite and release. They were either an oops thought you were food and aren't or a leave me the hell alone defensive bite. For the ones that have held on the ride all the things that burmmamma listed work fine. It can also be a simple as using a pencil If you roll a pencil along the bite it will remove their teeth without damaging them.