grizzly is a subspecies of brown bear,.... griz are called brown bear all the time

Not all bears are the same.

Preferably it's best to not interact with a black bear that's minding it's business so that dog is a little shit for running toward it and I can feel the frustration of it's owner. However if the black bear approaches you with agressive behavior, you actually want to make loud noises and look big. If they do attack (which is rare), fight back with everything you have. You do not play dead.

Grizzlies are a different story. You don't want to get loud and act bigger like you would with a black bear or mountain lion. I've been that close to a young griz when hiking with my grandfather but we just slowly backed up and went the opposite direction. The bear just kept on his path forward. Same thing happened many years before with my aunt and him only they encountered a mother with cubs. They did the same thing and nothing happened. Funny thing was it was in the same location.

GRiZ - The Future Is Now has been added as a related post - related requested by chicchorea on that post.

for my musician friend.presented without comment:
http://videosift.com/video/gRiZ-smash-the-funk-summerset-music-festival-2012

not a dubstep fan?
let me change that = http://videosift.com/video/gRiZ-smash-the-funk-summerset-music-festival-2012