I had this happen with my adult male normal.I think it was a normal feeding night, but I was cleaning cages and planning on feeding everybody the next day. I eventually got tagged after he missed my face and I was in the middle of weighing everybody. If I'd left him alone after the first attempt, I wouldn't have been bit.
As for the first bite, it was a defensive bite from my ball normal as a baby. I went to move a bottlecap before he slithered over it and apparently my hand came in to fast at his head.
I think I've gotten tagged by other baby balls.
The more memorable bites were from a carpet python and a variable kingsnake. It's really funny when the snake that bites you is thinner than your pinky.(And it doesn't hurt at all.)