Riddler's Revenge
If you look at the level of the headrests and restraints in the front row, you can see that they are not all the same height.   The headrests, over-the-shoulder restraints, and a very small seat are mounted on a vertical post that can move up and down to accommodate riders of different heights.  Before leaving the station, that post is locked into position.

©2017 Joel A. Rogers.