<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
Is it possible to derail a train by placing something big or heavy on the train tracks?
<|assistant|>
It is not possible to derail a train by placing something big or heavy on the train tracks. The train's weight and momentum is too great for any object to cause it to derail. Furthermore, train tracks have several cross-ties that limit the vertical movement of whatever is placed on the tracks. Any object placed on the tracks will most likely become stuck or damaged as the train passes over it, but will not derail the train.