Come to think of it, the T I was seeing for years suggested when that would happen to me when driving that I should stop the car and run around it for awhile.. He said if it happened at home I should run around the house several times.. Guess he was into "running".. Although I never tried it, I thought I'd pass along some of the professional help I received. Who knows maybe it works.......Good way to shed a few pounds even if it doesn't work........