The photo with the truck reminds me.....
The last year I worked in the woods I was running a D-7 Cat, pulling a Hyster Arch, pulling logs to the landing to be loaded on trucks. The last couple hundred feet to the landing was super steep. When you hit the steep spot, the only option was to put the logs on the ground, put the Cat in high gear and go like hell to keep the logs from running you over.
It was in the Spring and the Redwoods were running sap and the bark would actually slip off the log at times.
I had one single log about 7' diameter and 20' long.
Down off the hill we went going as fast as the Cat would go. I put both tracks in neutral by pulling back on the frictions, but even that wasn't fast enough. The log slipped out of the bark and slammed into the arch which jack knifed the Cat. It turned the Cat sideways in the skid road, and for some reason it was enough to bring everything to a stop. I had no control over anything.
It was just sheer luck the Cat stayed track side down and didn't roll over with the log on top of us.
They had to bring another Cat over and punch a road in from the side to clear that mess. Not counting the mess in my shorts.
No wonder I have nightmares about those days.