EE ATTEMPTED TO PULL IN SHIELD #173. WHEN IT DID NOT COME IN ALL THE WAY HE KNELT DOWN WITH LEFT KNEE ON PONTOON OF SHIELD #174 & RIGHT FOOT BETWEEN #174 & TAIL DRIVE. HE ADVANCED #173 & IT DR AGGED ALONG THE ROOF PULLING THE TAIL DRIVE BACK ABOUT 4"" PINNING HIS RIGHT FOOT BETWEEN #174 & TAIL DRIVE. HE WAS TAKEN TO E.R. WERE X-RAYS WERE NEGATIVE & DIAGNOSED WITH DEEP CONTUSIONS.