So, i'm doing my daily commute over the bridge, heading south, and as usual, as I come up to the toll gates i slow down from 70 to about 50 (slowly, nothing sudden, using engine brake rather than brakes) check my mirrors, nothing there. The speed limit is 40 and i HAVE been pulled over passing through those gates doing 50 before so I'm fairly careful at that little stretch re: my speed. As I am coming up to the gates, i check my mirrors again only to see a white 2-tonne truck (one of these) coming flying up behind me doing 70+ kph, flashing his lights as in to say "MOVE!!!". My only option was to shed a gear and rip it in an attempt to get up to his speed. The dude had the nerve to overtake me 200m down the road, slowing down as he passed me and gave me the "you asshole" stare as he drove by. I got his business name I was tempted to flip him off but controlled myself thinking he'd prob swerve at me. Had a cop been on the other side of that toll gate i would have been done doing 70+kph in a 40kph zone. Not a good look on P's. My question is this, if you're caught speeding because you're trying to buffer away from idiots or are trying to get out of a dangerous spot, is it a workable defense in court?