If you are confronted by Geese, who are defending their territory. Make like a Goose. Hiss, spread your arms like wings, and flap them. If you feel up to it, run at the Geese, while doing Goose stuff. Just make sure no one has a camera phone in their hands first
I grew up on farms, and this approach used to work for me as a nipper. Geese are bullies at heart.