I photographed these butting Rams along the Salmon River north of Salmon, Idaho. I had the camera set on continuous mode in hope of getting this photo. Out of 36 prints only this one caught them milliseconds before they hit. Camera was Pentax ME Super, film Kodak Supra 200 with Sigma 170-500mm f/5-6.3 APO at 450mm, f/8, 1/750 sec.