EE WAS RIDING IN THE BACK OF A 5 MAN- MANTRIP TRAVELING OUTBY @ BRK #7 ON THE NORTH BOXCUT TRACK AT THE TIME OF INJURY. MANTRIP STARTED DOWN THE BIG DIP & HIT ANOTHER 9 MAN- MANTRIP HEAD-ON @ THE BOTTOM. 5 MAN- MANTRIP DID NOT HAVE CLEARANCE FROM THE DISPATCHER.