When you tried to re-start, did it turn over slow, like the battery was weak?
If so, you may have a weak battery or alternator or some bad connections in your charging system.
My only experience with this is when my first new alternator came un-plugged (stupid mechanic lost the retaining wire on the plug & didn't replace it or tell me). The car ran for about 30 miles then the tach zeroed, then the other instruments, then everything died. The battery just couldn't keep the car running any more.
If your car runs fine now, your answers will likely be found elsewhere.
