Who uses a sling around their waist? You mean like a swami belt instead of a harness? That is a really bad idea. The human spine can withstand 10-12kN briefly with a standard sit harness. But with a swami, the spine cannot hold nearly that much.
That's pretty clear. It's a bad idea. Probably the sling would hold, but other stuff maybe not.
Therefore guys that use a sling around their waist in the event of a needed safety while setting their anchors is also a really bad idea.Would be painful.
Bounce testing in this fashion could hurt, altho' it might be a useful test.
Thanks to all for the insight.