FLT ATTENDANT RPT REGARDING A PAX WHO WAS BEHAVING VERY STRANGELY AND SEEMED QUITE UNEASY AND NERVOUS. CABIN ATTENDANTS AND OTHER PAX WERE CONCERNED. ACFT RETURNED TO GATE AND PAX WAS REMOVED.

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DURING TAXI; A PAX WALKS TO THE REAR OF THE AIRPLANE AND ASKS TO USE THE BATHROOM. HE WAS ACTING VERY NERVOUS. STAYED IN RESTROOM FOR ABOUT 4 MINS AND I NEVER HEARD A TOILET FLUSH. HE CAME OUT AND ASKED TO SIT IN THE REAR OF ACFT. HE HAD A VERY STRONG BAD BODY ODOR TO HIM. HE SAT TOWARDS THE REAR WITH ONLY 17 PAX ABOARD ON THE AISLE. FEELING VERY UNCOMFORTABLE ABOUT THIS PAX; I APCHED HIM BEFORE TKOF. I ASKED WHY HE WANTED TO SIT IN THE REAR. HE SAID TO HAVE A ROW; WHICH HE HAD IN HIS ORIGINAL SEAT TOWARDS THE FRONT. I THEN ASKED IF HE HAD COME IN ON ANOTHER FLT. RESPONSE WAS YES. I ASKED IF HE WAS VISITING FRIENDS IN LOS ANGELES; RESPONSE WAS NO. I ASKED WHAT ARE YOU GOING TO DO IN LOS ANGELES. HE LOOKED AWAY AND WOULD NOT ANSWER ME. I THEN CONTACTED THE COCKPIT AND LET THEM KNOW THE SIT. THE AFT FLT ATTENDANT FELT THE SAME WAY I DID AND WE WENT BACK TO THE GATE. THE #1 FLT ATTENDANT DID ASK TO SEE HIS BOARDING PASS AND HE WOULD NOT SHOW IT TO HER DURING TAXI. IN 14 YRS OF FLYING; I HAVE NEVER FELT SUCH STRONG FEELINGS ABOUT A PAX. HE WAS REMOVED AND WE LEFT FOR LAX. ALL 16 PAX THANKED US FOR REMOVING HIM AS THEY FELT UNEASY ALSO. HE HAD NO CARRY-ON OR CHKED LUGGAGE. CAME FROM NASHVILLE. 2 PAX ON OUR FLT SAID THEY WERE ON THE FLT WITH HIM AND HE WALKED THE AISLES THE ENTIRE FLT. FLT ATTENDANTS ON THE FLT SHOULD HAVE PUT A MESSAGE IN COMPUTER WITH AGENT TO WARN US OF PAX. I WOULD LIKE TO KNOW WHAT EVER HAPPENED TO THIS PAX.