I had a tick like that when I was a kid. It must have been right around the time McLain was suspended because I remember my father joking to a doctor that it came from that. I actually didn't know what was going on with McLain at the time. Anyway, the doctor asked if I was a lefty or a southpaw. I started to correct him, but my father stopped me since the doctor was either messing with me or was being stupid. I suspect the former. Wow, it's weird how that all just came back to me. The tick didn't last long.