They say that when you are dying your entire life passes before your eyes in just an instant. There is another way to experience that sensation, of your entire life passing so quickly before you, one that leaves you in a much less permanent state of death. You want to watch your entire life pass before you in an instant? Just have kids.
Many people who suffer from serious health problems spend a significant amount time in a hospital. They typically have a variety of appointments with doctors and therapists, and much of their time is consumed traveling among medical professionals. Providing a yoga class in a hospital setting allows patients to have access to yoga in a convenient location.