boneshaker [ˈbəʊnˌʃeɪkə] n

1. an early type of bicycle having solid tires and no springs
2. Slang any decrepit or rickety vehicle
They called it a boneshaker because the seat of the bicycle sat right on the frame and there was no suspension.  Top hats and tails, only a fancy man could afford this pleasure ride.  Suspension or not this guy does not seem to care.

This skeleton rider is heading South to Mississippi. 

Thanks to Chad in Madison, MS.