I too have been to this place many times and have had a few of these Geese be very aggressive with no provocation at all. This pond has a walking/excersize path around it and they will come onto the track after you. Could have been mating season, I dont care enough to know that much about Goose sex.
Its interesting that the city posts signs here claiming they "Are not responsible for the Water Fowl" so who is bringing the charges? The ones that need to be prosecuted are the people that dumped them off here to start with!!!