On the way to work this morning, just hopped on the Bruce Highway [QLD] southbound and notice in the inside lane in front of me a 90's model Nissan Patrol moving around its lane like it's driver was heavily distracted with something. He goes right onto the inside shoulder and then corrects suddenly and appears to go back to what he was doing and then moves over towards the outside lane and sideswipes a EF/EL falcon's rear RHS quarter panel! This all occurred in front of me, I already had a decent gap after watching the antics of this person, but I was still on the brakes. Scary stuff first thing in the morning at 110kph, especially when this nutter was on the inside of me when I was merging on... Patrol goes back into its lane speeds up and finds a gap in the outside lane. Falcon speeds off after it thinking that it's doing a runner. Eventually I go past on the inside seeing as the Patrol is no longer driving like a idiot - nice big bullbar scrape in the side of the Falcon and a very angry driver. The Patrol driver's expression told me that he knew he was going to be put though the wringer.