you are sat in it i snapped , just controlling myself enough to refrain from grabbing him by the scruff of his neck , dragging him out of his seat and ramming his nose into the side of the aircraft that was parked right in front of him , i might have dented it , and so he slowly got up and walked around it ( twice ) , noting all the planes serial numbers in his note book , then eased himself back down and laboriously wrote about half a page in another note book , and then placed the invoice to one side with a sneering the reference numbers dont tally .