David Haas had us doing this without accompaniment at the Perth conference starting with the basses and adding one line at a time until we were all at it, with actions and a good time was had by all. It is an adaptation of a Zulu song and is suitable for gathering or processing, especially with a large group.
This is what it is meant to sound like:
GIA sells the sheet music here and if you look at the preview there are lots of ad libbed phrases to sing over the basic track.
My backing is not entirely serious as it is meant to be accompanied by drums only but at least I start the lines sequentially and then all sorts of things start happening.
This is Hass teaching the song live and also at another event below:
This is a similar song (? the source) and sounds magnificent: