Very clever setup there in the last clip. Just glides along nicely.
Ron jeez. How fast would you go if the rails were covered in rust.

No different than the young blokes here skateboarding down the road with 52 mtr long road trains loaded with grain going past. You wonder why they do it.
But as for the rails, now I've seen it, I'd certainly give it a go, if a suitable area wasn't so close by for landsailing.