A performance series, “Passing,” in which he is prone in public — in front of the State House, in Copley Square — tossing a basketball in the air. “I use my body, a black male body, in relationship to images of power,” Forrester said. His position on the ground, he noted, recalls the space allotted to enslaved people on slave ships. The basketball pays homage to the artist’s late father, as if he’s having a toss with the old man up in heaven.