I thought i’d share this image found courtsey of google images search. I thought it a rather ingeniuous structure, although not too sure about actually abseiling off it. I can’t imagine trying to risk assess this beast, top of the list ‘structural collapse’, probability well if a kid tied those knots it is probably quite high! Risk of impalement high. Anchor failure – high. Death or serious injury almost certain, no wonder I found it on a scouting website!