I was inspired by weightless VR to build my own Virtual reality bungee system. The main challenge I had was installing the swivel hook in my rebar reinforced concrete ceiling. I tried it myself with a cheap little plug-in hammer drill and failed, then called a contractor to get a guy with a serious heavy-duty drill to get the job done. If you have a wood ceiling this step will be MUCH easier. But alas, everything in China is made on concrete. Thus this video.