I forget what the deal was but I know I've seen these pics - oh probably a year ago or so. I thought there was a write-up including pics on the urbanlegends.com website
http://www.urbanlegends.com/animals/bear_attacks.html but all I found was a write-up saying that there weren't any black bear attacks in California. Then again this pic that you've posted says Alaska.
I know I received this via email awhile ago - my mom used to send me all these fantastic Urban Legend things thinking they were real. lol Fortunately now she doesn't trust anything she gets on the 'net and runs it through the UrbanLegends.com site before forwarding to the whole family.
BTW...that bottom pic was just sick. Hadn't seen that one included with these before. NOTHING could prepare you for that. *shudder*