The #1 screen at jobsite had plugged and was overflowing material. In an effort to get it stopped, EE took off running towards control panel to shut it off. EE tripped and fell to the ground, landed on right shoulder and broke clavicle. Went to hospital, treated and discharged. Advised to take days off til 1/17/12 and light duty, no lifting over 10lbs until 1/27/12.