I tried to start my car today, and all i heard was a click, and then nothing. I had somebody push my car (it's a manual) to get it to start. once i got it to work, we tried to start it again, and nothing. We thought it was the battery, so later I took the battery out and to Autozone to get it tested. They said the battery was fine, and when we put it back in, the car started normally 5 times in a row. Any Ideas?