Somehow, I ended up watching part of a show about old toys. They showed a train where you put water in the little boiler then added alcohol to another reservoir, and you lit 3 wicks on fire. The boiler heated up and you gave it a little push and the train started going around the tracks. But they forgot to put a throttle on the train, so after while the boiler kept getting hotter and the train kept going faster and faster. The train would run off the tracks and the alcohol would spill out all over, and the flaming wicks would start a fire.
Ahh, those were the good old days when kids could lose an eye, cut off a limb, or easily burn the house down.