I'll offer one sugestion, since the engine was overheated some of this heat was also transferred to your starter. A hot engine is hard to crank and a hot starter is much less efficient electrically than a cold one - it's possible it simply couldn't muster up the power to turn the engine over. Later with everything cool (relatively) it was again no problem. I would also suggest that you watch it for the cause of the overheating problem, I don't think it was oil if you were just a little low.
Hudson Force 50