When I was doing some sewing in my van, I put the safety pins in the headliner, directly overhead, as I pulled them out of the fabric. It only occurred to me later, that the 2 inch pins could serve as a weapon, in a pinch. More than one scumbag would definitely call for the hornet spray or brake cleaner, though. I like the hornet spray especially, cause it has a huge nozzle, which guarantees I won't point it in the wrong direction! :+