In my first years of business I had one guy do some of the stupidest things I have ever seen. He ran the mower up on the trailer with deck down with the blades running ! Made one of the awfullest noises I ever heard, killed the engine instantly ! Only thing it did to the mower was it took a hunk out of one of the blades. Then one day we were mowing a customers lawn down by his house and he disappeared so I went down to his house to find him. There in the driveway was one of my riders with the throttle running wide open and he was no where to be found ! Said he had to go to the bathroom. I said you could have shut the mower off ! And the final thing he did was, he put one of my weed eaters in the rack on the trailer and never put the pins in it ! I went around a corner and of course it took quite a few tumbles on the road and busted the cover all up on it. It was one of my high dollar Echos. That was it, three strikes and your out ! The funny thing was he was one of the nicest guys you would ever meet and he showed up every day on time.