i had this monster truck R/C... worth about $1000, and i broke the engine in slowly and according to the instructions... on the first glorious day when i could take it to the track and race it and belt it over jumps and all that, i went down to the bmx track in castle hill with my mate... i had my turn and then gave him a turn. about 30 seconds later, i was carrying the truck back to the car, front left axle in about 4 pieces, wheel just hanging on... full speed into a pole will rip one of these things apart... it was a sad day for me.