Brought mine home 60 minute drive, 2 lane roads, no highway. All was fine. Took my daughter to school next day (3 miles) and after I watched her go into the building noticed white smoke coming from the grill. I was like...$#!+ nooooooo!
Opened the hood, was more like steam and volume was like if someone was puffing a cigar. Let it stop with engine off, restarted engine, did it again. I recorded it, checked for drips or leaks (nothing on the ground or visible looking into the engine bay). Drove the 3 miles home and did closer inspection. Coolant looked fine then and after cooldown...no wetness under the engine or on the floor.
Has never done it since. Been 4000 miles in a bit over a year. I figured it was coolant overfill. Checked my oil level, adjusted my tire pressure, pushed in my fuses, considered myself lucky.