Vehicle? Easy: Bultaco sherpa T. For those who don't know what that is, it was the best trials bike available for a long time, 70's and 80's, for those who don't know what a trials bike is, think rock crawler with two wheels, for those who don't know what a rock crawler is, well, use your imagination. That bike had 4 low gears and one high that would get up to 35 if the tires were aired up,(they never were) you could hop off and walk alongside the first 2 gears, 3 and 4 required a trot. We actually had slowness competitions, where having the ability to roll backwards while keeping your feet on the pegs was a definite advantage. With the gears so close together it was not necessary to shift very often, wich was a good thing because all the japanese bikes i had ridden had given me the bad habit of shifting with the wrong foot and the pedal on that side was a brake on the bultaco, like the gods had intended. Very embarrasing when a panic stop resulted in a crash shift into a lower gear and the resulting rev that was an unmistakable indicater of someone made inept by the japanese influence like me. OOPS. oh well, that was the slowest, ever-CEMETO!