i got my epoch last night.......my guess is the sudden jerking stop means the battery needs recharging . when i pick it up and then go forward in the air itll go off and on....but when i recharge it goes just like it should i hope that what it is..i know i sound stupid but im not used to built in battery cars........my mini-z the steering always got real slow when it needed its batteies recharged........can anyone confirm this being right.?