A message to anyone thinking of committing Suicide

[Optimus Prime]

Some throbber jumped under a train I was on last year. At 07:20 as the train was arriving inside Waterloo station itself!

Suffice to say they survived as the train was doing about 5mph

Just how fat are you that a train at 5mph hasn't enough momentum to kill you?

[TimberWolf]

Just how fat are you that a train at 5mph hasn't enough momentum to kill you?

Even if the train were infinitely massive and the collision totally elastic, a person could at maximum only bounce off the train at double their approach speed, i.e. 10 mph in this case, if the person weren't also initially moving towards the train. [If the person were moving towards the train, the recoil speed gets doubled by that amount too, ouch]. The train wouldn't be slowed and the person would instantaneously accelerate to 10mph, a bit like trotting into a brick wall and bouncing off. Best not done with the head. I once walked into a lamppost, but that was more of an inelastic collision, which isn't as bad.

[BrilloPad]

If I commit suicide I will cause the maximum inconvenience possible. Maybe I will drive a truck full of explosives into the dartford tunnel and explode them. Or set off an EMP in the middle of the city.

[Lockhouse]

The earlier train was delayed by an hour at Waterloo last night so I arrived home at the same time.

[Halo Jones]

Just how fat are you that a train at 5mph hasn't enough momentum to kill you?

Normally on the underground it’s not the train impact but the 3rd rail, which will electrocute them (as its DC it will cause the person to stick to it (so never help anyone who is stuck until they kill the power)