>>1431767me and a friend used to rig up old Lego trains in a battering ram contest,
starting with an equal number of parts, and loose parts to the other train as they fell off yours.
so one train would be larger than the other until the smaller train found a way to break apart the larger one.
eventually both trains were driven on all wheels and had multiple battery banks,
along with huge cow catcher super structures to try and derail or otherwise deflect the other train.
thankfully it reached stalemate before any permanent damage was done to the trains.