I found the videos in you tube. They come from an italian hunter, Mr. Tito Parigi who I dont know. But seem he lived some great adventures in Zambia
http://www.youtube.com/watch?v=waZPUZjBspw

It looks as if the buffalo is laying down as they approach(sleeping or sick, maybe stuck in mud?). Does not seem very sporting - kinda like shooting a cow in the pasture.

they speak italian. Tha buffalo was wounded from his friend