Bowline on a Coil
Start with 15 or so feet of the belay line wrapped around your torso with about 3 feet left over
Create a loop in the long end of the line, just like you would for the regular bowline.
Use the short piece on the other side of the wraps to finish off the bowline
The finished knot.
This was often used long ago as an impromptu harness. this is not recommended today
because of the availablity of pre-fabricated harnesses and the ability to tie a much
better harness from 1 inch tubular webbing. If none of those are available, however, this
method is preferable to a single loop around the body because it distributes the weight
much more across all those wraps.