Not so terribly uncommon. I had a 24 hour break at some point in rehab to spend some time with my wife in a 'normal' environment. We couldn't go home, too far, so we got a hotel room, went out to dinner, I don't remember what else, maybe we went to the bookstore or something. I don't recall any story about swimming, but it was nice, went fine. Call it a 'test', call it whatever you want. I don't recall if it was planned in advance.