I would, by way of introduction, like to point out that your correspondent has in fact cycled across the Wadi Rum in Jordan and somewhat surprisingly also Israel from end to end and a battlefield tour of Arnhem by bike, (good idea hmm?!).
I thought then, that I knew the odd thing or two about mountain bikes. I don't. This fella Danny Macaskill does though. Enjoy the short movie, it's worth it to see the Cuillin Ridgeline, never mind the barking lunatic cycling along it.