OK! This is the second time this has happened! The first time this happened my girlfriend and I were just sitting in a parking lot... the car was in park and a hissing noise was coming from the hood. I turned the car off and smoke poured out of the hood. I noticed I was about empty on cdolant. I bought some and filled it up. Not even two weeks later... tonight actually... we were parked in a parking lot talking. The car was on and it did it again!!! We checked it and the coolant was fine... needed a little more because of the amount that was sprayed all over ther ground. It seems to overheat when I'm just parked or stopped at a light but when I'm driving it's fine.(?) I figured it would be the other way around...