True, this same thing happened to me with a huge group of about thirty or thirty five geese. I saw them from pretty far off and I started clapping and yelling to chase them off the canal path. All this did was to agitate the aggressive males. They lined up in a line in front to block my path. I wasn't that familiar at the time with these birds so I figured I'd be more intimidating. I got louder and started to sprint right at the center of them. The males got more agitated. They started to bob their heads and hissing. I was playing chicken with a group of geese. I was sure they would back down. I sprinted fast and hard right to the line, they didn't back down. Right at the last minute I took a hard left into thick woods and brush to miss them. I'm glad I didn't try running through the center. These were tough birds.