Bummer trip home Mrs Repty. Worst trip I can recall was when I was a kid driving to East Gipsland. My mum slowed down for road works, as gravel had only been laid. However, the 4x4 behind us didn't appreciate her slowing down, so in its wisdom it decided to overtake us. Well, a shower of stones hit us and 2 secs later the windscreen turned white, not good at 80kph. Real considerate bloke.
As for the speeding fine, I wonder how easily you could contest it. Considering you are a witness to the speeding and the criticism cameras etc are getting at the moment, you may have a chance.
Afterall, if everyone took their fines to court (as we all have that right) the courts would be booked out for ages. It's interesting that small, personal usage amounts of dope are now no longer illegal in Vic b/c the courts complained that they were overwhelmed hearing too many cases that were for trivial offenses. Hmmm, things might change afterall
Cheers,