I was in traffic on Burke Road at Camberwell and some older geeza in a silver Getz pulled up in the right lane behind traffic. I was behind him so decided that since the left lane was empty, I'd go there. I was going slowly (about 40km/h). He decided he'd also do the same thing after I'd gone except he didn't bother to turn his head. I stayed towards the left of the lane in case something like that would happen. I was going downhill and grabbed the front brake and started squeezing. I put on a bit too much back brake and felt the rear starting to drift left. It was no biggie. I got on the horn as soon as I could but he was about 4 car lengths in front of me by then (I'm not so proficient with reaching the horn since I never reach there). I kept an eye on him and he never looked in his rear vision mirror so didn't know or care than he'd come close-ish to knocking me off. As for not knowing I was there, I had to toot the horn at him at the previous set of lights because he was preoccupied with something else (looking down) rather than keeping his eyes on the road and taking off once the cars in front of him had cleared off. Being the selfish driver that he is, he accelerated quickly to get in front of the tram that was about 50m ahead of him in the right lane just so that he could be in front of it at the red light (Riversdale Rd). Being second in line in the left lane wasn't good enough. At the closest point, there was about 1.5m between my front wheel and the back corner of his car. If I'd been in the right hand wheel path it would have been scarier. I got a bit annoyed/angry after that and wanted to tell him what he'd done at the next set of lights. I couldn't once he'd changed lanes. I'd settled down totally after going 100m and let it go. On the way home along the Monash, I kept an eye in my mirrors, was going 100km/h then signalled left to go in the left lane from the middle. There was nobody there at that point. I decided to do a headcheck anyway. What do you know, a businessman type in at new Liberty accelerated from behind me and to the left and into the space that I was going to occupy. He did this in the time that it took for me to put on my indicator, wait two seconds and turn my head. After he'd cleared off, I changed lanes. It doesn't take much to get into trouble. It'd be nice if it was compulsory for people with car licenses to have to ride a motorbike for a short time (say a few months).