At some point in the 1980s, I read in the newspaper that someone in the Washington, DC, metropolitan area was looking for a wing walker. The item said that the best candidates might come from strength sports (I think that was the term) such as wrestling or gymnastics.
I think the Flying Circus in Bealeton, VA (near DC) brought back free wing-walking (i.e. not strapped to the plane), and continues their barnstorming airshows to this day:
It’s a good thing wing-tennis never, uhhh, took off either!
Anohow, as one story goes, one of the half moon bay nurseries was started by a former barnstormer whose wife threatened divorce after his umpteenth crash, so he settled down and started a nursery.