I needed to find out what was going on. Everything was cool to the touch. My first thought was that the bec had smoked (there is a reason for that). So I wanted to unplug the battery but first I needed to shut down the system. It may have been coincidesce but the moment I hit the switch............zoom bang. I really had no time to do anything. I had and have never seen anything like this again. I am rigging up a 1/8 buggy and I am going to try the 5cell again.