Not sure if i believe this pic. looks like a shop to me but who knows.....
I typed moose in snopes to see if it this story came up and found nothing. But check out some of these other moose stories that check out! crazy
This one did not walk away like the one you described
http://www.snopes.com/photos/accident/moose.asp
and this one is just weird and unlucky!
http://www.snopes.com/photos/animals/poormoose.asp