LGT MAKES GAR AS METRO TAXIES BACK ONTO RWY AFTER TRYING TO TURNOFF.

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I WAS THE FO ON AIRLINES FLT FROM MSP TO LAX. IT WAS A CLR; CALM SEMI MOONLIT NIGHT. WE WERE CLRED FROM THE ILS RWY 25L APCH OFF THE CIVIT INTXN ARR. WE WERE CLRED TO LAND ON RWY 25L AT THE OM. THE AIRPLANE LNDG AHEAD OF US WAS A MERLIN METRO; ALTHOUGH WE COULDN'T SEE IT LNDG BECAUSE OF DARKNESS AND IT'S SMALL SIZE. AT 1/2 MI FINAL; THE CAPT ASKED ME IF THE METRO HAD CLRED THE RWY YET. I DIDN'T KNOW; AND AT THE SAME TIME; WE BEGAN TO SEE THE METRO TURNING OFF THE RWY AT TXWY 36. HOWEVER; THE ACFT AHEAD OF THE METRO-9 767 WAS STOPPED ON TXWY 36 BTWN RWY 25L AND RWY 25R. SO THE METRO; HAVING MISSED THE EARLIER TURNOFF THAT THEY CUSTOMARILY MAKE; COULDN'T TURN OFF AT RWY 36. THE TWR TOLD HIM TO PROCEED ON THE RWY TO TXWY 42; AND TURN OFF THERE. WE SAW THE METRO TURN BACK ONTO THE RWY AND START DOWN FOR RWY 42. AT THAT POINT; WE INITIATED A GAR APPROX FROM 100 FT AGL. IN RETROSPECT; IT WAS VERY APPARENT TO US THAT THE TWR CTLR WAS GOING TO LET US LAND WITH THE METRO STILL TAXIING DOWN THE RWY; AND JUST DIDN'T REALIZE WHAT WAS GOING ON. CLRLY; IT WAS OUR CALL TO THE TWR INQUIRING ABOUT WHETHER OR NOT THE RWY WAS CLR THAT CLUED THEM INTO WHAT WAS HAPPENING. A FATAL MISHAP ON RWY 24L AT LAX OCCURRED SEVERAL YRS AGO UNDER VERY SIMILAR CIRCUMSTANCES. HAVE THEY LEARNED ANYTHING?