https://31.media.tumblr.com/53fc9e953178a40d89e2a8f8cbc46047/tumblr_inline_mjd95kPo3A1qz4rgp.gif

if not what are they doing

Yes, on safari in Africa I saw this behavior. The film appears to be going too fast, however.

We were told it's a way of males to show dominance. It certainly was an unusual sequence of interactions.

https://31.media.tumblr.com/53fc9e953178a40d89e2a8f8cbc46047/tumblr_inline_mjd95kPo3A1qz4rgp.gif

if not what are they doing