ellie gorman explains. >> james has gotten used to his prosthetic but not to the pain after losing his leg. at worst, it feels like an electrical shock. >> for an instant you have that pain. >> laura bux balm explains the pain. >> the brain sends the information and when there is no feedback, the loop isn't complete. the brain sends a signal of pain. it's a known problem for years, dating back to civil war veterans. treatments available are not very effective, so mr. wolf is participating in a trial to see if virtual reality can help. it's a clap ration between medicine and the research institute using a specially designed program, amputees play games in a virtual world. >> they are moving both legs and look in the goggles to see an avatar of themselves with two complete legs. >> that way the feedback is complete so there should be less pain. it's experimental but so far the results are promising. >> i think it's exciting. it's something that can help people. >> mr. wolf has to get used to the system, but he's hoping it can help. >> at least get relief from phantom pain. i'm not expect