INST RATED PVT PLT OF AN SMA SEL BECAME DISORIENTED AND PENETRATED CLASS B AIRSPACE AND SUBSEQUENTLY; AFTER LNDG; TAXIED BACK ONTO THE ACTIVE RWY ON WHICH THE RPTR HAD JUST LANDED. RPTR COMPLAINED OF BECOMING DISORIENTED AND NOT UNDERSTANDING ATC CLRNC INSTRUCTIONS!

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FIRST TIME IN THIS AREA -- WAS EXPECTING VISUAL APCH. ABOUT 10 MINS PRIOR TO LNDG TOLD ILS RWY 9L -- THOUGHT HE SAID LOC OUT; PERHAPS ALSO MISUNDERSTOOD COURSE HEADING. MISSED TURN; CTLR UPSET; TURNED ME AROUND AND GAVE ME VECTORS TO RWY. LNDG OKAY; MANAGED TO EXIT FIRST TXWY; HAD NO MORE DIRECTION (IE; CHANGE TO GND). FOR SOME REASON I TURNED AROUND AND WENT BACK ON THE RWY; TAXIED FAST AND WENT OFF NEXT TXWY; COULD HAVE BEEN A DEADLY MISTAKE. ANOTHER AIRPLANE WAS SOMEPLACE ON FINAL. HE WAS TOLD TO INITIATE A GAR; WHICH HE DID. I WAS TOLD TO CALL THE TWR. THERE WAS A SPECIAL EVENT IN MIAMI AND ARPT WAS UNUSUALLY BUSY. TALKED TO THE CTLR WHO SAID HE UNDERSTOOD: 1) I GOT DISORIENTED (SITUATIONAL AWARENESS) AND THAT I FLEW INTO MIAMI AIRSPACE; HOWEVER; 2) HE GOT BUSY AND RATHER LOST TRACK OF ME. HE COULDN'T BELIEVE I HAD GONE BACK ON RWY; WHY? I HAD NO EXPLANATION FOR SOME REASON; PERHAPS BECAUSE I WAS NOT HEARING FROM TWR OR GND; I DECIDED I WAS IN THE WRONG PLACE AND JUST MOVED. I SPOKE TO HIS SUPVR WHO WAS UNDERSTANDABLY IRATE AND UPSET. SHE SAID SHE WOULD NOT WRITE IT UP BUT NEVER DO IT AGAIN. MY THOUGHTS; FIRST TIME IN AREA; UPSET THAT I WAS NOT DOING WHAT I SHOULD; BEHIND THE ACFT; STRESS FROM HAVING A PAX ON MY FIRST ANGEL FLT. I AM NORMALLY SUPER- CAUTIOUS AND THE FACT THAT I HAD LOST CTL JUST UNSETTLED ME. CTLR'S 'LOSING ME'; WRONG OR MISUNDERSTOOD HEADING; ETC; ALL CONTRIBUTED. WILL BE AWARE IN BUSY CLASS TO BE READY FOR AN ILS IN LIEU OF VISUAL.