Driving into Westside coffee last night with Mrs Scumbag on the Monash I saw some appalling driving behaviour from a courier truck. There was a small car on the inside lane, travelling at about 105kmh. There was a lane to the left, but it was busy and about to end. The truck was sitting about a metre behind the car and closed up further flashing his lights. We were to the right of the truck and backed off to actually allow it to overtake on the right. He decided against it and harassed the car into the lane that was about to end before eventually changing lanes and doing the same in the right most lane. We were absolutely gobsmacked. The car was driving above the posted limit, the truck had come up behind it so I assume there was no reason for the antagonism. We made room for the truck to move if it wanted to. I don't normally do this, but given the recent accident in the tunnel (which we were approaching) I called the courier company who said they'd call the driver straight away. About that time the driver started to drive less erratically and less aggressively. I didn't feel that comfortable calling the company, but if you're going to drive so aggressively and so badly, don't do it with your employers telephone number on the back of the truck. The traffic was heavy so there was little or nothing to be gained by driving so hard and it would only have required one little mistake from anyone for a seriously bad accident to occur. So, what would you have done?