Minecart

The Minecart is located inside the mineshaft in Through Abandoned: The Underground City. At first, it only has three wheels, but going into the miner's cabin and getting the wheel will restore it. It cannot move, and inside there is an oil can. Filling the oil can and using it on the minecart will "activate it" and pulling the lever will send it crashing into the rubble leading to the open area.