you should publish videos on this to demonstrate for us in wallaby-less/wallaby-extinct locales.

I would if I could! Sometimes it's kind of funny - you see a few sets of ears poking out amongst the long grass of the road verge. A couple of beeps on the horn and suddenly a mob of wallabies emerges - and often hop straight across the road rather than back into the bush. That's the main use of the horn - to flush out the daft critters who may well otherwise jump straight into your path.