The contraption that we called a “Foefieslide” was created by slinging a length of steel, multi strand cable between two trees. The trees had to be at different elevations so that the cable ran from a high point to a low point and the steeper the angle of decline the better. A pulley wheel with a handle was slid onto the cable prior to securing the cable ends to their respective trees. A length of rope was tied to the pulley so that it could be reeled up to the high point where the brave (or stupid?) could grab hold of the handle with both hands and then launch themselves to slide down the length of the cable. Generally the height of the cable above the ground was sufficient to dissuade the one sliding down from letting go. The choice was simple. You could let go and break some bones in the fall or you could hold on until the end of the ride. No one let go!
On the day in question we had a newly made slide that was not only high but ran over water and it needed a test run. Quite stupidly I had volunteered.