In the 60's there was a candy store near our school called "Roy's Corner" (unofficially, I think) at the corner of Granville and Greenview. Once a year the Duncan yoyo guy would show up there to show off his stuff and hawk yoyos. A few years later, I met a friend of an older guy in the neighborhood who had been a Duncan yoyo champ. (I think all the demo guys wore the designation "champ"). By the time I met him, he was a consummate alcoholic and drug user who died before he was 30. It was one of too many shocking stories that I can recall about those who fell victim to the cultural upheaval of that era.