It appears that Bob Lazar's hobby of building jet powered race cars -
(http://files.abovetopsecret.com/images/member/be3bf1229a8e.jpg)
(http://www.ufo.se/ufofiles/images2/lazarjet.jpg)
(http://www.gravitywarpdrive.com/Bob_Lazar_S4_Disc_Images/Bob_Lazar_Jet_Car.gif)
is fairly well known and has inspired a few others - ;D
http://www.youtube.com/watch?v=zBJu2q3sDrw
Happy tinkering! 8)