Me and a group of about twenty of my friends were passing through the ranch of my neighbor. There is a large prairie with his horses. Suddenly, a group of about 10 horses charged us. All of a sudden they ran, at about twice the speed of a human gait, at us. Me and 17 others panicked, shouted, and tried to retreat while getting no response from the horses at all. Two of my friends stood their ground, while one of them placed a hand in front of himself and the horses stopped! The rest of the group just continued and we were not harassed anymore. The two guys, who stood their ground, petted the horses and were comfortable enough even to take photos.
I almost never see any humans interacting with these horses. They just seem to be semi-wild animals. Maybe that had something to do with the entire incident, but honestly, I do not know.
Can anyone provide an interpretation on what happened, whether my friends were in danger, and what to do in such a situation?