Lately, Sammy has taken to playing a new "game". It only happens about once a week, give or take. He'll be following me around or just playing on his own, then as I walk away (or sometimes even when I'm laying down, if I'm on my front), he'll run up, wrap his front legs around my leg (always from the back, never in front of me) and bite me once. Then he'll try to run before I can catch him and give him trouble for it. He ONLY does this to me..........does anyone else's cat do this?