After a vigorous run this afternoon, a couple of spirited 20 to 80 mph onto connecting highways and my engine is idling very high 2,000 RPM.
When I parked it at home it barfed about a half quart of coolant.
Not a hot day and this car is driven very infrequently and babied to the highest degree.

3 hours later after it cooled off I went food shopping and everything was normal again, no issues.
Tonight, no warning lights, no alarming messages and runs great .....no issues.

Any clues?