About five years ago i was doing a bit of landscaping on my section. For the earthworks i hired a mid size excavator, a couple of tons i guess. Once i was finished with the digging i reversed the work van with the trailer up the drive to load the digger. Its on a mild slope. For some reason i was feeling a bit dim that day and neglected to place chocks behind the wheels. The van was in gear with the handbrake on but i had forgot to un do the reversing stopper for te trailer brakes. Driving the digger up onto th trailer the trailer tipped up and lifted up the rear wheels of the van clean off the road. Now there was nothing to stop the whole show taking off down the road. Which it did at an alarming rate. I did try to hit reverse on the digger but it stalled. I got the shits an leaped off it straight into a signpost. That hurt quie a lot but the van, trailer and digger flew down the road and vered off to the right and jacknifed into the ditch. It ripped the towbar clean off the van. Thank goodness that was the only damage. Now i am paranoid about chocking the wheels! Got to use my 4by of the time to get the gear out of the ditch though.