Car stops randomly, but not often.

[lsmalley]

My car will sometimes randomly shut off. So far it has happened 3 times. Once as I was driving about 20 mph, the car lost power and dash lights lit up and I was able to drift to the spider of the road and restart car. Another time I was on the freeway sitting in traffic and the car engine cut off, I put the car in neutral and restarted it. Another time I was just sitting in my driveway, car in D, but I wasn't moving and the engine shut off. The last time it happened I was reversing out of my driveway and as I began to turn the wheel it shut off. I did notice that my car idles high sometimes and sometimes its fine. I checked the ovp and both fuses are fine. I also checked the voltage regulator visually by taking it out of the alternator and it seems fine. Any suggestions?