Walters attached the balloons to his lawn chair , filled them with helium , put on a parachute , and strapped himself into the chair in the backyard of a home at 1633 W. 7th St. in San Pedro .
They went to the backyard of a home at 1633 W. 7th St. in San Pedro Walters attached the balloons to his lawnchair , filled them with helium .