Excercise bike pedals built into the passenger side of a car, or hidden when not in use. Useful for long trips when you have nothing to do but snack. Of course, can be integrated into a hybrid system for better gas milage.-- Worldgineer, Dec 28 2005 More of a rowing machine, but ... http://www.humancar.com/There is a link w/ videos also. They say 30mph + [Zimmy, Oct 19 2006] I tend to operate pretend pedals when I'm a passenger (a nervous passenger) applying faux brakes is a wonderful stomach exercise.-- po, Dec 29 2005 The door handle squeeze is also good at burning calories.-- Worldgineer, Dec 29 2005 I find that getting out of the car and running beside it tends to be more effective.-- Jscotty, Dec 29 2005 Wouldn't you maybe be more likely to slam into outstreched branches and wires, and even traffic signs? Oh hell, why not!-- blissmiss, Dec 29 2005 a fully baked idea with specific new application. should it be deleted ?-- vedarshi, Jan 01 2006 They should do this for planes, too.-- NHstud1216, Jan 02 2006 No kidding.. planes, trains and automobiles. I wouldn't mind one on my bike, too... oh, wait... bun with pedals [+]-- roleohibachi, Jan 02 2006 random, halfbakery