There was a recent article here in Canada in the National Post about the gentleman who is attempting to perfect a grizzlie-proof suit. Apparently this suit has many other excellent qualities, as you can be shot at, run over by a truck, beaten with iron rods, etc. and come out smiling. The picture in the paper showed him being attacked with a chain saw, IIRC. There was a documentary made about him some time back, with one of his earlier suits. He tried to attract a grizzlie to attack him, but couldn't interest any.

Anyway, the article said that the inventor couldn't afford proper molded parts for certain critical parts of the suit, so he used massive amounts of duct tape. I can't remember the exact number, but it was something like 7000 feet of it. So duct tape, in sufficient quantity, will protect you against grizzlie bear attacks it seems.

It of course has many uses -- a friend of mine, in a Red Green moment, made a bird feeder out of an old pole, old pump parts, a plastic hood, a pie pan, and duct tape. Worked quite well. Personally I like to use it to seal packages, and think of the poor soul on the receiving end trying to get it open.:)