I used to carry a pair of those old "clackers", two clear plastic balls connected by a cord, in my car. They made for a nasty weapon, and for fun I practiced with 'em like a bolo. Once during a routine traffic stop (broken tail light), the officer asked me "What's up with these?". I told him my kid got 'em at a flea market, and he then said "I haven't seen these in years...better keep 'em at home.", and threw them back into my car on the back seat. So now I keep a screw driver in the glove box
Franco