Name: minecart pants!
Description: The pinnacle of minecart technology that still has rails attached to it. The minecart pants are for those who seek high speed thrills without all the slow inventory juggling of conventional minecarts. To use them is simplicity its self. You wear the pants, you right click on a rail with your empty fist, you automatically lock to the rail and assume the "sitting in a minecart" position, and away you go!
May be powered (whether by batpack or traditional coal I cant decide) allowing you to propel yourself at minecart speed under your own power and control.scrapped to similar to rejected idea and qsuit legs the rest of the idea is still being suggested