I know where all that is.
Once a line was anchored to a barrel of concrete. Big ‘ol indian boy down at Apache bailed out of the derrick, too heavy, the barrel came closer as he slid down at an every faster speed. He hit the ground, rolled a couple of times and took off.
Actually I remember crews using a piece of hose over a cable to slide down from the derrick before that. They would hang from the cable with their hands and would squeeze the hose as a brake. The Geroimo line had an upside down T that hung from the cable that you set on and had a lever that operated brake.