While your talking about cars tearing down the road with smoke trailing behind. A story from days long gone: our branch in the Andrew or navy after we qualified as divers got sent on the famed DEODs course or a short course on bomb disposal if you don’t know. We got taught how to deal with a lot of things that might ignite and we were encouraged to lark around booby trapping everything and anything as a way of teaching us to deal with real life situations. The usual place we’re the heads where we dreamed up ever more inventive ways of giving our mates an enema, going to the loo was a long process 
Not the course I was on but a friend, they booby trapped someone’s car, not just any car but a near new Ford Capri, his pride and joy. What they did was rig up a smoke flare to go off inside the car just as he drove off. Well apparently this car was seen leaving the main entrance to a large military base in Kent looking like a parachute display team
I did see the aftermath 

Not the course I was on but a friend, they booby trapped someone’s car, not just any car but a near new Ford Capri, his pride and joy. What they did was rig up a smoke flare to go off inside the car just as he drove off. Well apparently this car was seen leaving the main entrance to a large military base in Kent looking like a parachute display team
I did see the aftermath 

