So I was running my Summit today, nothing different than any other run. Stock gearing, I have upgraded driveshafts, a heat sink on the motor, and thats pretty much it for hop ups. I drove using the series connector using two of the stock batteries (nothing wrong or different). The temperature outside was 85 degrees Fahrenheit, which is why I think this happened but I want peoples opinions regardless. Near the end of my run, the truck stops and wont move when i'm pushing on the throttle. The steering works fine but wont go. I walk over and it has the blinking red light which means heat problem. I touch the ESC and motor and they are both too hot to touch, so that's obviously the reason it turned off. My question is why did it do that? I'm guessing that the series speed created more heat and the 85 degree day just was too much and the little motor couldn't keep up with itself. I would love helpful info/tips/insights! Also, do I need to worry about damage to the truck or it's components? I ran inside, took the body off and put it in front of a huge fan which cooled it off in no time. Thanks for any help in advance!