Had a go at skeleton bob when I was in the army in Germany many years ago – can't remember the name of the course, but it wasn't regarded as being very challenging. I think it was the same year a couple of squaddies got killed taking on the Oberstdorf big ski jump on a beer crate!
Typical army introduction to a new sport – "Wear this helmet, to stop you damaging the ice with your head. Don't let go with your hands or you'll lose your fingers. Use your feet to brake and steer, it won't work, but it will make you feel better. Off you go then…"
A little bit scary because there was no feeling of being in control, and it felt proper fast.
Good fun, but once was enough for me. Consigned, along with hang gliding, to the done it, got the t-shirt, won't be doing it again list of pastimes.