PVT PLT OF SMA LANDS ON A RWY STILL OCCUPIED BY PRECEDING TFC.

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THERE WERE 4 OR 5 ACFT IN THE PATTERN THAT AFTERNOON; AND I WAS IN A WARRIOR PRACTICING SHORT/SOFT FIELD TECHNIQUES. THE LAST 1/3 OF RWY 27 HAS NO TXWY AND PLTS SOMETIMES LAND AND HOLD AT THE TURNAROUND AT THE END OF RWY 27 FOR LNDG TFC. TODAY WAS NO EXCEPTION. I WAS LNDG BEHIND A C152; SO I EXTENDED MY DOWNWIND LEG AND SET UP FOR A SHORT FIELD LNDG. I KEPT THE C152 IN SIGHT UNTIL I SAW HIM ROLL PAST THE LAST TXWY; 2000 FT DOWN THE RWY. THEN I GOT BUSY WITH MY LNDG; EXPECTING THE C152 TO HOLD AT THE END; ALTHOUGH THEY HAD NOT ANNOUNCED THEIR INTENTIONS. I CALLED MY POS AT EACH TURN IN THE PATTERN; AND AGAIN ON SHORT FINAL. I DID A SHORT FIELD LNDG AND STOPPED ABOUT 500 FT BEFORE THE TXWY; ABOUT 1000 FT BEHIND THE C152. THEN I NOTICED THE C152 TURNING AROUND TO BACK-TAXI; AND THEN THEY STOPPED WHEN THEY SAW ME SITTING THERE. THE INSTRUCTOR ASKED ON THE RADIO 'WHAT ARE YOU DOING?' A FEW TIMES WITH NO OTHER IDENT; THEN ANNOUNCED HE WAS TAXIING CLR OF THE RWY; AND DID SO. AFTER HE WAS CLR; I FOLLOWED HIM OFF THE RWY AT A SAFE DISTANCE. CONTRIBUTING FACTORS: 1) ONCE I SAW THE C152 ROLL PAST THE LAST TXWY; I ASSUMED HE WOULD HOLD AT THE END INSTEAD OF IMMEDIATELY STARTING TO A BACK-TAXI. 2) THERE WAS SOME BUMPINESS ON SHORT FINAL; AS IT WAS A BREEZY DAY; AND THIS DISTR ME FROM KEEPING AN EYE ON HIM. 3) THERE WAS A LOT OF RADIO TFC; AND THE INSTRUCTOR AND STUDENT MAY NOT HAVE NOTICED LNDG TFC BEHIND THEM. IF THEY HAD; THEY MIGHT HAVE HELD AT THE END. 4) SINCE I WAS ALREADY SET UP FOR A SHORT FIELD LNDG; I EXECUTED IT AS I HAD PLANNED; STOPPING ABOUT 1000 FT BEHIND THE C152. HOWEVER; IF I'D HAD BRAKE PROBS OR A CHANGE IN THE WIND; THERE COULD HAVE BEEN MORE SERIOUS PROBS. CORRECTIVE ACTIONS: 1) I COULD HAVE DONE A GAR. 2) THE C152 COULD HAVE HELD AT THE OTHER END TURNAROUND. BTWN THESE 2 ALTERNATIVES; I THINK HOLDING AT THE END WOULD INVOLVE LESS OVERALL RISK.