They do this at the Atlanta Zoo now too, I have a friend who went and she said it was funny.
Actually, I've watch recent (2005/2006) documentaries on the National Geographic channel (ch. 108) lately. Let me tell you it is graphic. They have animal footage from Africa that I have never seen in some 30 years of film including Cannibalism and battles between hyennas and lions.
But what I would love to see is an un-editted version of a lion fight; no slow motions or clip stopage. It seems that all film makers censor animal violence.
The only thing that I have seen that comes close to a lion battle is a Brown Bear fight on the Grizzly Man documentary. (Grizzly Man - Treadwell - He died.)