Back in the day, I knew guys on already-fast 250 cc motorcycles who used to draft Greyhounds (the buses, not the dogs) to save gas -- they'd get 120 mpg at 65 - 70 mph, as those measures were in those days. They'd just tick in behind the bus, a yard or two back of the bumper, away from the exhaust. Don't know any of them now ...
Pete, do people queue in NZ to enter the annual Darwin awards?
J.