I obviously enjoy photos from world's fairs. This view from the 1982 Knoxville World's Fair shows that one of the vendors hoped others shared that interest as well. This booth was set up at the end of sky ride, capturing views of the riders. The results were posted up on the side of the booth, where guests could try to find themselves. Today this is all done electronically, of course, and the selections are done on monitors.
I wonder how many they sold, and how many are still around today.