So today I was at the track and rode for a while. My arms felt FINE while I was riding but once I went to drive home.... My arms locked up terribly, my arms and fingers where paralyzed and I couldnt move them AT ALL! I could feel my forearm muscles hard as a rock. And then while I was changing a blown tire on the car on the way home it happened again! I have NO MOVEMENT at all in them when it happens. Im kinda worried about this now, because it could be really dangerous while driving. Is this arm pump, or somthing else?