Anyone ever have this? My buttocks has had some twitching of late, but the left cheek is really acting up. I did go to the gym last two days and did leg exercises, so I am wondering if thats the culprit because I do feel a little soreness. Every time I get up, or walk around, Ill get this rapid fire twitch which lasts for like 5-10 seconds and stops. Whoa! Its like a fast heartbeat. Those with similar spells chime in.