TWO EMPLOYEES WERE STANDING ON A WORK PLATFORM EXAMINING THE 16' HOIST ROPES. THE HOISTMAN DECELERATED THE HOIST FROM 300' A MN TO 50' A MIN. HE INADVERTANTLY DOUBLED CLICK THE 5 WHICH CAUSED THE SKIP TO COME UP STRIKING THE PLATFORM. ONE EE WAS PUSHED BACK, SUFFERED BROKEN THUMB, RIBS, AND COLLAR BONE.