The hole could lead down to a ramp instead of a flat bottom. Something steep enough that anyone who falls down keeps going after the first impact.
Though my guess (if anyone ever actually used a kick to death hole) would be they had an access tunnel to get rid of the bodies so they wouldn’t eventually make the kick to death hole stinky. Assuming they could even smell it over the usual classical/pre-classical age stink.
The hole could lead down to a ramp instead of a flat bottom. Something steep enough that anyone who falls down keeps going after the first impact.
Though my guess (if anyone ever actually used a kick to death hole) would be they had an access tunnel to get rid of the bodies so they wouldn’t eventually make the kick to death hole stinky. Assuming they could even smell it over the usual classical/pre-classical age stink.