Its amazing how may fire risks there are in a garage!
In fairness accidents happen, if I dropped my car off and it was taken for a road test around the block I wouldnt have a problem with it (assuming it was driven sensibly). These things happen. Its the guys attitude that would have caused me to flip and let the rage out!
Theres a lot to be said for having a mechanic that you trust. Thats way I give my car to Dave when its MOT time, know its in safe hands.