EE STEPPED ON A 6""-8"" ROCK THAT HE DIDN'T SEE. THE ACCIDENT INJURY DID NOT INVOLVE ANY ASPECT OF COMPLIANCE WITH RULES & REGULATIONS OR INVOLVED ANY MINE EQUIPMENT OR THE MINING SYSTEM OR IN VOLVE JOB SKILLS OR MINER PROFICIENCY, TRAINING OR ATTITUDE, OR INVOLVE PROTECTIVE ITEMS RELATED TO CLOTHING OR PROTECTIVE DEVICES ON EQUIPMENT.