One of my friend refered this great video featuring survival game in the wild. It shows a rare sight of conflict between pride of lions, a herd of buffalo and 2 crocodiles for saving a young calf at a watering hole in South Africa's Kruger National Park.
A few lions basically play tug of war with crocodiles using a baby buffalo's body...and then a huge herd of buffalos come to fight back.
This is what I call great video shoot at right time and right place.
Update: It seems that was not the only occassion buffalo have attacked the lions. I saw another clip from Discovery Channel in which buffallo have attacked the lions.