i saw a street full to the brim of puffing , roaring horseless carriages , inane mechanical contraptions , each self-propelled , as though it had become its own railway engine , but with smaller spoked wheels and no tracks to run on , some carrying a spare wheel on the side , some bearing a loose canopy on top , each with two strange upright lamps on the front of the smokebox like bright , unnaturally lit eyes , each contrivance pumping smoke from a single chimney beneath the rear instead of one atop the front like any normal steam engine !