Before revision: Sometime in the 1980s, Robert Carlson began running rivers in California, U.S.A. using an ocean bodyboard and ended up making his own board that was bigger and thickerand had handles.
After revision: Sometime in the 1980s, Robert Carlson began running rivers in California, U.S.A. using an ocean bodyboard eventually redesigning it to to be thicker, longer, with two additional handles.