If he bit, latched and wrapped you, that was a hunger strike, not a defense strike.
Can you tell us about his enclosure, his temps and setup, what does he eat and how often ?
Truly aggressive balls are very rare, but they are out there. Usually it can be traced to poor husbandry, lack of feeding, fear or confusion, or a few other things.
Give us as much background detail as you can, and we'll do our best to help.
Gale