Vipers in Shacks
They may have burnt out pretty quick Mr. Evil, but I can think of one occasion when a Shack *just* made it back to nearest land with multiple dead Griffons, courtesy of a Viper that kept going for an inordinate amount of time... IIRC one of the larger issues was the fuel pump suffering from AVGAS, considerably less lubricative than the stuff it was designed to pump...
Now if we're going to get into boosters, what about the 'plastic fantastic' (AKA RB 162)
R1