You knew he made jokes, but apparently, he makes cars too. Jay Leno and Ed Welbum (GM VP of Global Design) sketched the EcoJet on the back of a napkin, and now GM has made the sketch a reality. The EcoJet uses bio-diesel fuel to power its 650 horsepower engine.
GM's release noted, "What would keep a group of automotive designers up all night? 'Tonight Show' host Jay Leno, for starters, but not by his monologue or parade of Hollywood guests. This time it's because the late-night talk show host invited the General Motors Advanced Design Studio to help design a mid-engine, turbine-powered supercar called EcoJet."