As I don't possess a centre of balance, even trying to mount and stand upright on a skateboard fills me with dread. I did have a go on one many years (and about six stone) ago. I damned near broke both ankles, one wrist and suffered from a severe bout of gravel rash up both arms.
Part of me has a great respect for those who can do the tricks on these things but there's another, more cynical, part of me that enjoys the slapstick moments when it all goes very wrong.
I am still young and enthusiastic (at least inside my head). The rest of me seems to be ageing faster by the week.....