display of dominance?!

not too sure really, it looked like it to me at first but after 5 or 10 minutes of this they walked side by side as if they were friends and then a few minutes later started chasing each other around again...we watched them for close on 40 minutes and each time I was wondering are they friends fooling around or male dominance display...

 

Karoo national park, South Africa

 

Done