Plane on a treadmill question

[SexyGreyFox]

I've just been watching a Jackie Chan movie where they jump from a train onto grass.
If the train is moving at 100mph would they hit the ground at 100mph and therefore kill or maim themselves?
My 1 brain cell says that would happen.

 

[SexyGreyFox]

I thought Iwas right, £5 won.

 

[SexyGreyFox]

That explains it better than anything can, if that was doing 100mph he'd be dead or very seriously injured.

I suppose it's just another one of those Hollywood myths where 100s if not 1000s of films have featured somebody jumping from a moving vehicle unscathed.

I've seen quite a few films where they jump out onto water, in real life I presume that would be nearly as bad?