GMAA photo 73 runners crossed the line at Saturday’s Green Mountain Athletic Association Pump It Up! 5 Miler in Jericho and Essex. 76, if you count the three ponies. As the GMAA Facebook page exclaimed, “One for the history books in Jericho!” Three loose ponies wandered onto the course just as Neal Graves, the men’s leader, came into the final stretch. The equine Rosie Ruiz wannabes led to a finish line moment nobody will forget: competition, ch…