THE EE WAS LOADING A VEHICLE WITH A MIXTURE OF AGGREGATE & CONCRETE IN A SLURRY FORM. AS THE MIXTURE CAME DOWN THE SHAFT BY GRAVITY FEED THRU A 6"" DIAMETER HOSE IT BEGAN WHIPPING OUT OF CONT ROL. HE WAS KNOCKED OFF THE TRUCK & STRUCK IN THE HEAD & LOWER LIP WITH THE HOSE. HE ALSO GOT ALKALINE & ABRASIVE MATERIAL IN BOTHEEYE S