Goodness, glad your son wasn't hurt and that Greyson survived the attack as well.
A couple of weeks ago a neighbor of ours down the street found bear tracks in their backyard. The Game & Fish people came out and said that from the tracks the bear appears to be a young one and probably about 200 lbs. And we live in a subdivision in town that backs up to the river, so they figured he wandered in from down there. Now we're afraid our cats are going to encounter the bear some night if he comes back.