Two years ago, I got to watch these three Bighorn Rams battle for more than 30 minutes. In addition to the quintessential head butting, there was also lots of leaning, circling, and occasional kicks like this. As you can tell from the bottom of this picture, this all happened in the right-of-way for the highway leading through the Gardner river canyon.
7D2, 100-400 IS II @ 114 mm, 1/2500 s, f/10, iso 1600, tripod