Koala bear = stroke of genius
One of my favorite parts of the movie was the koala bear, from the beginning when ADC puts down INXS and Australians and doesn't think much of it to the point where he is lounging with the bear and watching television to the bear hanging from a rope on the ceiling fan, which incidentally I found to be hilarious, especially given ADC's very muted initial response.
The film is so creatively wild and spontaneous with this kind of thing that they would never be able to produce something like this in this day and age with all the remakes and rehashes and other subpar crap.