Think jogging weight, but, with one prong bent back, one forward, and the center knife a spring loaded, steel bar.
http://www.udap.com/video/Bear%20Attack.wmv
After watching this, it doesn't look like the bear is really attacking, just a tame bear, having a little jog, and swat the trainer.
http://www.udap.com/video/bearsprayed.wmv
This is a pretty good sized black bear...
http://www.udap.com/video/marksbearattackvideo.wmv
Point in posting these is I agree, that pepper spray has to be handy, and, you have to be able to get to it, nearly instantly, same as being attacked by a bear, having a gun, etc.
https://store.udap.com/merchant.mvc?...tegory_Code=PS