LOL that's a funny scenario, but according to Gimlin when John Green interviewed him Patterson's horse never fell. It turned trying to reverse it's direction of travel, bucked and Patterson grabbed the camera and slid off the horse.
It is funny. What's not so funny is the fact that P&G told so many variant accounts of what happened. Anyone trying to research the events from testimonies is faced with contradictions and changing stories. When that stuff is associated with Bob Heironimus, he's labeled a liar/hoaxer because of it. There is often a double-standard applied when proponents or skeptics evaluate these things.
The situation with the differing and changing stories of P&G shows itself when anyone tries to write about the encounter and surrounding events. When someone like Meldrum writes a new book that recounts what happened, he has the opportunity to tell it in any version he chooses. These versions can all be individually referenced to interviews, or even versions given by other authors.
Was the encounter just after noon, or about 1:30? Both can be referenced.
Was Roger's foot crushed by his horse, or not? Both can be referenced.
Was Patty first seen crouching, or standing? Both can be referenced.
Did she stand and stare for 30 seconds, or start walking right away? Both can be referenced.
Did they track her for 3.5 miles afterwards, "on up the creek bed quite a ways", or even not far at all. All three can be referenced.
There are certainly more things than those which can be picked from by any journalist. That situation began immediately after the supposed event.