I don't think there is anything more irritating than having a kangaroo jump out in front of you. They can grow up to 6-foot tall. They really are very stupid and they always seem to be in the way.

Once when I was out on a training ride in a rural area someone's pet kangaroo started chasing after me. I tried to sprint away from it but they are soooo fast. It followed me for about 4 kilometres, so I stopped and got off my bike and tried chasing it away, but unfortunately that didn't work. In the end I had to ride all the way back until I found the owners of this kangaroo who told me that they constantly take it out for exercise using their motorbike and they were not suprised that it followed me.