Well was driving down springvale road in my cage towards the city at about 8.45 when i noticed in my rear mirror a pretty nice looking bike.. All's good until we hit a traffic light, but instead of stopping like all riders would do, he actually accelerated hard and lane splitted to cut in front of the car in front of me in the middle lane, this was all before we came to a complete stop.. At the next set of lights, he being stuck behind a bus moving really slowly, i managed to zip into the right lane and decided to accelerate pass the bus and motorcycle mentioned. But before i actually could, he decides that he also wants to change into my lane without doing a head check, but luckily i've sort of anticipated that he would cut into my lane so i did not accelerate very hard. He then saw me accelerating past him and at the very last second decided not to cut into my lane while causing himself to fishtail a bit, because i think he must've accelerated quite hard to try and get into my lane. When I drove past him, i like all drivers would, shook my head and when i was past him i saw him cutting into my lane behind me and did some form of hand gesture. Whether it was a "sorry i made a mistake" one, or a "f u i'm king of the world" i'm not sure as I wasn't looking long enough. Though i'll give him the benefit of doubt and say he was apologising. After that little incident i was already thinking to myself, damn if i wasn't a rider myself, i probably would've be wanting to kill him. And then this happened. about 10 seconds after incident above, we hit a school zone (40kmph zone). So the cars in front of me slowed down, and i slowed down to about 50kmph too. But he decided that the speed limit applies only to cars and then lane splits to the left lane and was doing at least 80kmph in a school zone. At this point, i was basically going "wtf at this absolute wanker", and thought to myself, no wonder people tend to have a negative attitude against riders. I bet everyone on the road with that guy this morning would hate riders by now.