A week or so back my car overheated as I pulled into my driveway. Water pump is pumping, fan is going. Weird shit. I cooled her back down and added water to the system and then could not duplicate it. Idled in the driveway for 30 min. with ac on. Turned ac off and ran a high idle for about two minutes to even get the temp up to normal. Been driving her daily all week 100*+ days with no issues. Happened again yesterday sitting at a light. Managed to get it into the gas station on the corner and shut the motor. Once she stopped spewing coolant I ran the pump and added water and cooled her back down in a couple of minutes. Sat there with the car running, nothing out of the ordinary. First thought is the thermostat which I will pull today or tomorrow but it strikes me as weird is you wouldn't think it would be this intermittent of an issue if the thermostat was sticking, no? Or can it just shut randomly? I mean car was up to temp and been driving about 20 minutes before she got hot.