SMA ENTERING TFC PATTERN HAS NMAC WITH ACFT DELIBERATELY TURNING TO PASS OVERHEAD.

Narrative

MY ACFT; PA38-112; WAS WBOUND RETURNING TO OUR HOME BASE; TPF; FL; AFTER A ROUTINE TRAINING FLT. WE WERE INBOUND AT 800 FT MSL; STRAIGHT AND LEVEL FLT ATTITUDE; PREPARING TO ENTER A STANDARD 45 DEG; MID-FIELD DOWNWIND FOR LNDG ON RWY 21 AT TPF. (THE STANDARD PATTERN ALT AT TPF IS 800 FT MSL.) I NOTICED A CESSNA ACFT AT OUR 9 O'CLOCK POS APCHING FROM THE S TRAVELING N AT A COMPARABLE ALT; AND A HELI AT OUR 2 O'CLOCK POS TRAVELING E AND AT A LOWER ALT. SINCE MY STUDENT PLT WAS MAINTAINING A STEADY FLT COURSE; AND BASED UPON VISUAL OBSERVATION OF THE CESSNA'S FLT PATH; I DETERMINED THAT; WITHIN A FEW SECONDS; WE WOULD CROSS WELL IN FRONT OF THE CESSNA WITH THERE BEING ABSOLUTELY NO HAZARD TO EITHER ACFT. CONTINUED OBSERVATION CONFIRMED THIS CONCLUSION SINCE THE CESSNA WAS NOW AT APPROX OUR 8 O'CLOCK POS. JUST PRIOR TO THE CESSNA PASSING BEHIND OUR ACT; AND SLIGHTLY ABOVE; I OBSERVED THE CESSNA MAKE WHAT APPEARED TO BE AN INTENTIONAL L BANK SO AS TO PASS DIRECTLY OVER OUR TAIL. THERE WAS NO TIME TO TAKE ANY EVASIVE ACTION -- WITHIN A MOMENT THE CESSNA PASSED OVER OUR ACFT'S TAIL AND THEN HE CONTINUED ON A NORTHERLY COURSE. SINCE I DID RECOGNIZE THE HELI AS BEING BASED AT TPF; I IMMEDIATELY CALLED ON TPF UNICOM (122.8) AND ASKED IF HE OBSERVED WHAT HAD JUST HAPPENED. HE RESPONDED THAT HE DID OBSERVE THE ENTIRE INCIDENT; INCLUDING THE CESSNA INITIATING A L BANK; WHICH APPEARED TO HIM AS BEING INTENTIONAL. THE CESSNA WAS AN ALL RED ACFT WITH RETRACTABLE LNDG GEAR -- IT COULD HAVE BEEN A C210. I WAS NOT ABLE TO GET THE N-NUMBER. HOWEVER; THE HELI PLT STATED THAT HE RECOGNIZED THE ACFT AS PROBABLY BELONGING TO AN FBO BASED AT TAMPA INTL ARPT. IT IS MY JUDGEMENT THAT THIS ACTION WAS INTENTIONAL; ON THE PART OF THE CESSNA PLT; IN AN EFFORT TO 'PLAY' AS IF HE WERE IN THE MIL MAKING A STRAFING PASS ON ANOTHER ACFT. ALSO; THE PASS WAS AT THE LAST MOMENT AND ONLY AT OUR TAIL SO AS TO NOT BE OBSERVED. IT IS EASY TO RECOGNIZE OUR ACFT AS A TRAINER; PA38-112; AND ASSUME THAT A STUDENT PLT MIGHT NOT SEE HIM MAKE THE PASS SINCE A STUDENT'S CONCENTRATION COULD BE ON ENTERING A DOWNWIND. IF THE CESSNA PLT WOULD HAVE CONTINUED ON HIS ORIGINAL FLT PATH; THERE WOULD HAVE BEEN NO HAZARD. IN ORDER TO PREVENT A RECURRENCE IT IS IMPORTANT THAT PLTS REMAIN FOCUSED ON THE ORIGINAL PURPOSE OF THEIR FLTS RATHER THAN INTERRUPTING; WHAT MAY BE CONSIDERED ROUTINE; FOR HAVING A LITTLE THRILL IF AN OPPORTUNITY IS THERE