Wrong.  The male guide was attacked AFTER he sprayed the bear which begs the question did the spray initiate the attack on him.  The bear eventually gave up the attack but in defensive bear attacks the bear always gives up the attack eventually.  Whether the spray had anything to do with it we'll never know.

There was a case in BC years ago where two women were confronted by a grizzly bear.  It didn't attack them until they sprayed it.  Bears can take a lot of pain and shrug it off.