I have to admit, that when I'm on a motorcycle, and have someone constantly on my arse without passing me at many given chances, I keep .375 diameter steel ball bearings in my jacket pocket. One or two tossed over the shoulder seems to do the trick with little to no damage to their car.

I haven't needed it yet, but if I ever need it for protection, I carry my 1911. And before anyone goes off on the deep end about it, I'm legally licensed to carry concealed in three different states...OH, UT, and PA.

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1987 560SL
85,000 miles

One forty cent stamp and an envelope will get you one from FL too.

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On some nights I still believe that a car with the fuel gauge on empty can run about fifty more miles if you have the right music very loud on the radio. - HST

1983 300SD - 305000
1984 Toyota Landcruiser - 190000
1994 GMC Jimmy - 203000

https://media.giphy.com/media/X3nnss8PAj5aU/giphy.gif

Dropping bearings is too much IMHO.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

They are reserved only for those that are so close that I can smell the breath of the driver...all others get a pass.

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1987 560SL
85,000 miles