[Does so]

Pockets of scorpion nests. Gotta think outside the box.

Just scatter large pieces of plywood at the foot the wall. Scorpions will be very happy to accommodate.

[BeauBo]

How about laying deeply ridged concrete panels 8-12 feet from the foot of the wall, so you can't get good footing near it?

Falling from thirty feet unto uneven concrete, or even jumping the last few feet from a rope, would result in turned ankles, broken bones, or worse.