Actually, not so much. Most of the damage is below the nerve endings, so the most painful points are at where the spikes enter and exit the skin. It would definitely feel weird though...
Not really. Zelda1899 is right. Plus, I've tried somethinglike this when I was a kid. My parents sent me to the hospital all worried but they said it wasn't seious because I didn't pierce any veins and stuff. It was only a surface wound. I healed right on up in 2 weeks.