Thank you for the well wishes and speedy replies. I think the hose leak is a likely scenario for my Smart.. I was told the rear hose was split and that's where the leak likely began. Keep in mind that only a few days prior to the meltdown, I had driven from Upstate, NY to NYC... about 400 miles, with no problems whatsoever. There was nothing leaking from the car, and I know there was coolant in the reservoir because I did check fluid levels before leaving on my trip, including oil, and all were fine.
I drove the car around NYC the few days I was there, and again, it was fine. And it was fine for that hour or so that I was on the road before it stalled. So the 'fail' had to have occurred within a very short period of time. Call me crazy, but I think it's fair for me to have expected a warning light to come on if my coolant was leaking out all over my engine.
Was there a recall on the hoses rubbing? I can't find anything.
Thank you all again... I appreciate your time.