It's a very fast and painless way to go. The top speed of a metra train in the U.S is 79 mph. But let's just assume it's half that so 40 mph. The weight of a metra train is 385,000 lbs. Use this simple equation to calculate force. F=ma. 385,000x40=15,400,000 newtons or 3,461,920 lbs of force. That's equivalent to 288 African elephants. Yea, you're not going to survive 3,000,000 lbs of force hitting your face. Plus it's fast, easy, and simple. You don't have to go out of the way of getting prescription grade antiemetics just so you can swallow some SN. Or spend a ton of money on getting Nembutal. Not everyone has access to SN so the train could be a better method.