I once showed up to a ramp that had more pallets waiting for us than I had been told to expect. Typical occurance, sure, but this time we were already planned to be filled to the brim. I called up dispatch to inform them that we would have to leave some freight behind. The answer I got was, "No. You need to make it happen."

So, I emailed a copy of the company's own sheet that they send customers to show them the dimensions of the cargo area and said, "I usually find a way, but I can't beat physics on this one."