At a recent workshop Tim and I taught in Yorkville, Illinois, one of the participants arrived in a foot splint and crutches. She had recently sprained her ankle, complete with swelling and technicolor markings. Upon arrival on the second day, she was walking in a shoe, no crutch. Her husband had "sent her back to get some more of that QT stuff." The swelling and discoloration had vanished.
Seeing is believing, and the results wowed her classmates.