A man named Stephan Keller suffered a stroke that paralyzed the right side of his body. When presented with options for recovery, he chose virtual reality therapy over traditional physical therapy. Through virtual reality treatments, he was able to regain movement in his limbs much faster than would be expected with physical therapy alone. After just eleven virtual reality sessions, he was able to walk again, though with some limitation, a major improvement over what traditional therapy could provide. Virtual reality provides an immersive treatment that allows independent practice to speed recovery, while physical therapy is more painful, requires daily assistance, and often does not fully restore lost mobility.