A vehicle (300), comprising: a frame (310) comprising a head tube (314) and a rear driven axle support (312); a motion control system; and a payload support (320) movably connected to the frame (310) via the motion control system such that the payload support (320) moves non-linearly relative to the frame (310), wherein the payload support (320) comprises a seat support, and in a first operating state of the vehicle (300), the motion control system, in response to a driven acceleration of the frame (310) in a forward direction, imparts a force onto the payload support (320) that accelerates the seat support (320) in the forward direction at an acceleration no less than an acceleration of the rear driven axle support (312) in the forward direction.