RedactedNarrative: WHILE RAFTING DOWN THE ARKANSAS RIVER IN THE SECTION OF BROWNS CANYON, ALL 4 PASSENGERS WERE EJECTED FROM THE VESSEL AFTER HITTING THE STAIRCASE RAPID.  THE RAFT WENT DOWN STREAM WITH NO OPERATOR NOR PASSENGERS ABOARD.  A COMMERCIAL RAFTING TRIP PICKED UP ALL 4 PASSENGERS AND BROUGHT THEM TO SHORE.  VICTIM 1 SUFFERED FROM A LACERATION OF THE HEAD AFTER STRIKING A ROCK IN THE WATER AND WAS TAKEN TO THE HOSPITAL FOR STITCHES AND FURTHER EVALUATION.  THE RAFT WAS NEVER RECOVERED.