Was watching a bunch of runaway diesels. Diesels don't use spark plugs, they ignite fuel by compression. So if you let the engine get worn down to the point that it burns a lot of oil, sometimes it can "run away", or start burning up its own crankcase oil. It is impossible to stop the engine, except by suffocation (two methods I've read: blocking the air intake with something that can't be sucked in, like a board, using a CO2 fire extinguisher, or, you could leave the air filter in place and plug it up with the powder from a dry chemical extinguisher.
Anyways, found this little nugget set to "Jerk it Out" by The Caesars: