Skinnies; those features you don't ride all that often and might even be intimidated by. They require your balance to be on point, and a solid grasp on how to bail when necessary.
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This guy can obviously balance a bike, and you don't see him bail at all as he gets high off the ground at a skinny-paradise in England. If you have a thing for old-school wooden features, this is a place you will want to visit.