2- His spines are long and very sharp.
3- When he doesn't want to be picked up, he curls up to present his spines and pushes forward. Tonight he caught my hand between the hard plastic wall of his cage and his spines.
4- Very sharp.
5- One pin-prick on the palm bleeds a little bit.
6- 20 pin-pricks on the palm produce a surprising amount of blood. It is also itchy and painfull all at once.