Last night I was watching TV with my two sleeping cats, one on either side of me on the couch. Crash was sleeping quietly, but Burnie was making noises. They were not his usual noises of snoring, wheezing or even purring. This was different. I decided to check on him, so I just put my hand softly on his back. I never saw him move so fast. This gentle, laid back cat, turned and sunk either his teeth or claws into my hand. After looking at the marks now, I think he bit me and slid his teeth along.
Here are some pictures which were very hard to take. He got my right hand which is the hand I use to snap pictures, so they might not be very sharp. I had to balance the camera on a box and hold on while moving my left hand to snap the picture. Also, please don't pay any attention to any wrinkles.
That's not a mark on my thumb, just the joint, although he did put a puncture in my thumb, but it's not visible.