Sean Berkey was riding across town to work when he was attacked by a female brown bear. Story HERE.
My understanding is that the difference between a brown bear and a grizzly bear is just a matter of scale. The experts believe this was a mama bear with her cub. Berkey tried to put his bike between himself and the bear - sounds pretty instinctive - but the bear was not dissuaded. She slapped him around a little, and it sounds like she bit him on the leg. Then HE PLAYED DEAD. Apparently that's the best course of action unless you can really ride fast!! The bear lost interest and left.
The fish & game people wanted to close the area where the attack occurred. The city just put up warning signs, encouraging folks to proceed with caution.
Yeah... that would add some excitement to the morning commute, huh?