Hello I HAVE A QUESTION !!

I had a weird experience today . I had gone for a few errands today no problems car started and ran great no lights on dash everything fine !! , I stopped off to have early dinner 3 pm ,well after a nice early dinner I went to start car and nothing each time I turned key all lights on dash nothing no starter engage. Like it was dead. So I thought maybe starter went bad , so I was on a slight hill so I decided to pop the clutch to start going backwards . Nothing happened no go so I sat there. Well called the AAA to have car towed well while waiting to for AAA to answer I tried one more time and she started right up and I thought I didn't want to turn it off so let it run and drove to the bank and a few other stops so went to Wal Mart and figured I will turn it off well I wanted to see if it would start up after shutting it off well it did start right up and so I went in store 20 min came out car started right up again ran like a champ no codes no lights she ran like a new car . I had taken RCM out back last winter and soldered all the possible loose connections so didn't think this wasthe problem so I wanted to know if anyone has had this happen to them . I sometimes get a little frightened to drive Blaze to far from home , any idea what this could be ?? The car was on a slight grade with engine higher than the rear facing restaurant and on the slight hill in the parking lot popping the clutch going backwards then had back end near the curb in the parking space behind me in case the tow driver needed to get to the engine bay . ANY IDEAS and should this lead to more problems . This little car has its quirks . thanks