Video - Baby Elephant attacks keeper - Warning!

A video of an elephant knocking down and then pinning his trainer in a corner at an Ohio zoo has been released.

The elephant then backs away before charging at the keeper, who has been in a hospital since the attack three weeks ago.

The video was released by the Toledo Zoo and shows the keeper stumbling out of the enclosure while the elephant stands back.

The zoo's director says she's not sure why the elephant turned on the keeper, whom the elephant had known since birth.

She says it looks as if he was startled and started play-fighting like elephants do in the wild.

The injured man and his family initially fought against the video's release but changed their minds to show that the animal wasn't mistreated.