Coolant Leak / Overflow ???

[rick3000]

Hi,
I just got back from a half hour drive on the freeway, and something odd happened. Everything was fine the entire time I was driving and the second I parked the car, and shut off the engine, a bunch of coolant came flooding out of the right rear of the car, a little but inside the wheel. There was no coolant in the trunk, a very small amount of condensation on the trunk lid right above the coolant cap, and a little bit of coolant around the coolant cap.

The only thing I can think of is that I topped off the coolant a few days ago about 1/2" under the max. mark. It was 40° then, and today it was 65°.

Was this a coolant leak, or some sort of overflow drain?

Thanks!