BigJon,
SOunds like you got a raw deal. I can relate to the company's position, since I have to pay for damage that occurs on my jobs, but I also understand that sometimes you can't predict all that will happen. If you sell enough 80-ft. pruning jobs, you're bound to have something like this happen eventually.
Good luck finding a new job soon. I'm inclined to say good riddance to teh company, but i know it can be hard to look at it that way when you just lost a paycheck. Hang in there.
keith