You might think of trains as large unshakable vehicles of transportation, but it turns out that all you need to derail them are a few leaves on the track. That might sound crazy, but fall is the worst time of year for trains. Something as tiny as a leaf can cause serious slippage on the wheels of trains.
When leaves are run over by trains, they also release certain chemicals that cause the tracks to be more slippery as well. To understand further why leaves are such a serious problem for trains, check out the video below.