EE WAS HELPING ANOTHER EE WITH A HAULER THAT WASBROKEN DOWN. MIKE WAS WORKING IN MAIN PANEL AND THE HINGED PORTION THAT HAS CONTRACTORS ON IT KEPT SWINGING SHUT. SO EE KEPT HOLDING IT OPEN FOR OTHER EE. A PIECE OF RIB ROLLED OFF MEASURING ABOUT 40 "" WIDE BY 57""LONG BY 9""THICK. AND STRUCK EE HAND SMASHING HIS LITTLE FINGER BETWEEN THE PANEDL AND THE ROCK. THIS CAUSED HIS LITTLE FING