If you look closly at the persons feet, the left foot looks deformed, the front seat may be to rest his upper body on. Very interesting, given a chance I would like to try ridding it.
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Bentbaggerlen
"When the spirits are low, when the day appears dark, when work becomes monotonous, when hope hardly seems worth having, just mount a bicycle and go out for a spin down the road, without thought on anything but the ride you are taking." - Arthur Conan Doyle