Six percent of people think they can beat a grizzly bear
I've successfully fended off quite a few goose attacks. We had a territorial male with his female who tried to take over our walking path so daily for a couple weeks we dealt with them. The key there is they come at you wings spread and the head forward. You do not back down or try to avoid them. You boot them in the head if you don't have a nice stick. Eventually they'll get the message. Once I found a nice branch to use, he left the area just seeing me carry it.