During the summer my father and i worked out on the farms picking cotton and other stuff or we would rebuild roads and maintain them, during a day shift my father and i both had on the tractors, we were asked to clear away some overgrown land between an already existing paddock and the river bank. we had made a clearing about 1km long and roughing 500m wide, myself at one end and my father on the other as we both saw what looked like a goat for a split second, standing on its back legs in the distance for us both, except we couldn't really make out any details besides that it had thick looking course, off white hair like a mountain goat would and it was FAST, Very fast across the clearing we had made in a matter of seconds and it moved completely flat, with no up or down motion at all. we never saw it again and we both never finished making that clearing