I’m not sure that could make an accurate shot without standing on a platform.
I've worried about that as well, but they seem to be pretty stable and allow better "T" shooting form.
The whole reason I'm not flying planes in the Marine Corps anymore is because I had lumbar spine surgery. So for me, if can probably practice my shots and get "good enough" for a 20-30 yard poke while hanging that would be worth it not to have to hump around a crap ton of gear.
Decisions, decisions...