Back in the fall of '76, I was farming (about 300 acres irrigated land) and had a piece that had nice 1/2 mile runs when planting. The wheel tractors had trouble pulling a slight grade with all the equipment so was using an International TD14 crawler to pull 8' disc, 8' packer, 8' grain drill, all in one train. I put in long days, dawn to dusk for a couple of weeks to get it planted to winter wheat. Sometimes, Pa would come down (it was 65 miles from home, so I commuted) and help move the truck along the end of the field with the seed and help load the seed in the drill as needed.
On one end of the field was a 10' deep waste water ditch and one day I was very tired so Pa took a turn planting while I took a nap at lunch time. I woke up and could not hear the crawler pulling the hill as it should have been by then, so I drove across the field to see what was wrong... he had fallen asleep driving the crawler and woke up when it started going into the ditch. His quick reaction got it turned and out of the ditch but turning that sharp and quick was a mistake. The hitch on the disc got caught up in the track and went up over the cab of the tractor.. the hitch was beyond repair, so we used a logging chain to connect disc to tractor.. wish I had a camera then to capture one of the few mistakes Pa ever made.. I did not let him "relieve" me after that..
Some of the dryland farms (no irrigation) in central Washington were thousands of acres, kids fell asleep driving tractors all too often.. most of the time, no damage done.