i used to know someone who had cancer, and tried this (damn hippie) she is now dead, turns out she tried everything, including OD on painkillers. that last one worked, the cancer didn't spread much after that. stayed exactly 6ft below.
seemed like a good idea at the time. the hardest part of all this would be coming up with a cover story for why you built it.
although from looking at him, he might be shameless and just tell them "i love hanging by my nuts, is THAT OKAY BY YOU?"