Ok, i heard stuff about this before, but it just happened to me today for the first time in the hobby. when i started up my xtm .18 it ran backwards when i hit the gas. then i let it continue to run and about 10 seconds later, it perked up and then drove forwards. I have no idea how this happened, and i use a pull start to start it. I just thought id let you all know. I have no clue how the engine ran backwards than switched forwards by it self.