That's pretty amazing. But not suprising. A bunch of big animals with big horns will generall win. Most lions just go for the diseased ones or near death. And the Crocodile was pretty random too.
I saw a video on the Dicovery Channel that shows a Baby Hippo surrounded by 100s of Crocs. It's walking over with them, swimming with them and taunting them really. Not a single croc did anything. Not with Big Mamma right there on the shore looking after her baby.