Depends on the bite and the age of the animal a defensive strike will feel like a paper cut. (Quick bite and release)

A feeding bite depending where they hit can be a little more painful ( Bite + Constriction).

I had a big girl hitting me right on the knuckle (feeding strike) and it was painful for several days and my knuckle swelled up a little and bruised nothing really compare to the damage a big snake could have done.

Note: I will take a BP's bite over any other type of bites any day (rats, mice, dog, horse…)