"Pop quiz, hotshot. There's a bomb on a bus. Once the bus goes 50 miles an hour, the bomb is armed." The Runaway Caboose S2 Ep 15

Despite nearly burning the barn down with some pyrotechnics supplied by Wilie Oleson, Carl Sanderson along with Laura and Mary head to Springfield with Charles and Mr. Edwards to see a train.   And what an experience!  Inside a caboose unlinked from the rest of the train, this trio is on a downhill course and gaining momentum.  Communications are down at the end of the line which just happens to have a train leaving the station heading straight towards the oncoming caboose.  P.S. the President of the railroad is on this train. . After previously being struck by lightning and now this, will Laura reconsider ever doing extra credit work? Should we be worried about Carl Sanderson? Does this caboose have a bathroom on it?