I was on the way home after a long day, in the hilux. Going down the Maroondah highway in the far right lane (of 3 lanes).I was heading out of ringwood starting to come up the hill with croydon maccas on the left. A 50-60 year old lady in a old white corolla, pulls out into the traffic further up ahead, into the far left lane. Problem was she didn't stop coming across, or making any indication she was going to stay in that first left lane. She wandered over to the middle lane. By this time i was catching her pretty quickly doing 80 in a 80 zone. she must have been doing about 40 tops. I was sitting there thinking, "she is coming across isn't she, right infront of me, i bet, just watch". then all of a sudden, with no continual flow of movement like the last 2 lane changes, she jerks infront of me so fast. i saw it coming, but not that quick. i hit the brakes, and everything went into slow mo. I saw the smoke bellowing from my tyres coming up the sides of the hood. I saw my hood continuing to approach her rear, then I saw her car slowly getting some distance from me. I saw her look behind in the mirror to see what all the noise (tyre screech and freakin horn) was about. She had no freakin idea what had just happened. She continues to the far right turning lane, and turned right and cross the other side of the highway. I went back later that night (shopping run) and drove back passed that spot, there are 2 huge black lines where it happened, massive. What if i had been on my bike, that last jerked maneuver could be so dangerous for a rider, but then again, on my bike i might have slowed further back and i wouldn't have been so close to her for it to be a problem. scary huh!