>>937271543 (OP)
You can see how that hole is a perfect death trap.
You can bend your torso midway to get it down the hole, and help your body down with the holds on the sides, but when you fall too deep, the holds disappear, and your legs are now too deep to bend your body.
Pushing up can't work because you can't get a grip on the holds you lowered yourself with, meaning you can't return to that original position you were in when you bent down the hole. It'd require a miracle, and extremely careful thoughts, to get out of that, if it was even possible.