ORIGINAL: opeth

i need help with my rc truck i was driving it and i jit a bump and let go of the gas and **** like that but when it landed it went for like a couple inches and it just stopped. it wont move. so i picked it up, and the tires turned again like nothing was wrong but when i set it on the ground it wouldn't move the tires only move when its off the ground. im thinking theres somthing wrong with the engine but i dont want to **** with it and mess it up more. sooo if u have any ideas about wat might be wrong. please tell me.