Oh okay, I honestly didn't even know they could do that. He's only ever bit me 3 times, once when he was really tiny and barely had any teeth to bite with, once during feeding (it hurt quite a bit and bled a lot) and once when he was freaked out in his tank (he hardly grazed my finger though since I pulled away).
Does this mean that when they're freaked out they can bite you in a non-painful way? I thought all bites were equally painful and bloody as the feeding bite he gave me. If that's not the case, that does make me a bit more comfortable with handling him when he's scared like this.