About 15 years ago, one of dad's customers after he retired came by one evening with a really banged up older Cadet, think it was a 122. Anyway, his son-in-law (or some relative) was hauling the Cadet for him and the trailer came unhooked from the truck and deposited the Cadet in the middle of the highway. Other than bending the rear axles, the Cadet survived. Backed the trailer up to the shop (don't know how those 2 guys got the lawnmower back on because the owner was over 80 years old) and the 4 of us proceeded to roll/drag the mower onto the shop floor. I was at the back of the mower pulling when all of a sudden WHAM--trailer came unhooked again and slammed onto my foot--literally pinned me to the floor. Thank God for steel toed boots. Turns out, the guy had the wrong size ball on the truck.
As for the Cadet, there was another older Cadet outside with a blown engine and too worn out to justify repairing--but the hydro was good. Called the owner and he gave the rear to the other guy so dad did a swap and put the old man back in business.
Hope the foot feels better Tim! Now go get some safety toe footwear--lot of folks buying composite these days.