Famed aviation photographer (to me, anyway) Bill Larkins took it. Here's how Bill describes it:
William Larkins
"I just discovered this group and in scanning through it I noticed my photo of Merle Larson propping his Cub in flight. This has been floating around the Internet for awhile without any explanation. I took this in November 1946 and it shows him demonstrating a small air show stunt that he did. It appears that he is alone in the plane but there is another pilot (Gladys Davis) flying the plane from the back seat and he does have a rope tied around himself. Merle was a WWII B-24 pilot, flight instructor, inventor and builder of three unusual planes based at Buchanan Field, Concord, California."
Here's a link to it on the Cub FB page- interesting.
http://www.facebook.com/pages/Piper...332307504430&set=o.24356262978&type=3&theater.