The end is quite amazing. You need to watch it to fully appreciate the video.
Cattle can display similar behaviour in life threatening circumstances too in my experience.
Great stuff! Thanks for posting.
On a separate side note, it looks like a video from 1977, but it is too High Def !! 
Nice togs! 
(not that it matters!)
So your looking at the jocks .. well if thats the case
I think super-red"rainbow" needs a meeting asap with Richiefish for a make over.
