Is it an amusement-park ride or a workout device? The Hula Chair attempts to create the ab-workout sensation of using a hula hoop (actual exercise) while sitting down (generally not considered exercise). Giving your abs a workout while filing papers is a nice idea, but trying to focus while your lower half is throttling around like this is absurd and, more to the point, oddly erotic. Oh, and the chair costs upwards of $250.