Has anyone had a cat that has/had frequent muscle twitches? Nora often has these spells where the muscles on her back twitch or spasm over and over. She doesn't understand what they are, so she freaks out and jumps around like someone is poking or pinching her, then she will take off across the house and run into our closet ("her" room). It happens at least a couple times a day, and she's been getting them for her whole life. Has anyone heard of such a thing before? Maybe she is just really sensitive to them, but they are normal? *shrug*