I don't know what is worse, calling someone a temporary Australian just because they are doing something that you haven't got the balls to do or that you would wish pain or injury on another human being you sicko.
I think he's calling him a temporary australian because he's stupid and doing something dangerous, not just because he's doing something dangerous. Nothing wrong with riding a bike, but there's enough people doing it that are a danger to themselves and others. A couple of weeks ago I was on the sydney-newc freeway and saw a bike rider split-laning two semis that were doing 110. I couldn't even begin to guess what speed he was doing. You see enough people doing that and it starts to reflect on bike riders in general, just like bike riders see drivers doing retarded stuff and start generalising to the rest of the population.