Heheheh - I've just had a highly entertaining little sortie on York's outer ring road with a poor sod commuting to work, but at least with a smile on his face - his black and black Smart had a funky looking exhaust and a dump valve, so it sneezed every time he changed gear.
Highly entertaining! /thinks long and hard about a Smart CDI again/
Quick, mind you, at least until the speed limiter kicked in. Poor chap hadn't had it deactivated. :)