NMAC BTWN A BELLANCA 7ECA ON LNDG ROLLOUT AND A CESSNA 152 TRAINING FLT GOING BY 10 FT ABOVE HIM AND LNDG 25 FT IN FRONT OF HIM. THE OTHER ACFT NEVER OBSERVED THE 7ECA.

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SOMEWHERE AROUND 2-3 MI SE OF THE ARPT; I OBSERVED A CESSNA 152 DEPART RWY 18R ON THE RWY HEADING. THE PLT NEVER MADE ANY BROADCAST ON THE CTAF. I MAINTAINED A NORMAL SCAN FOR TFC; AS I ENTERED THE TFC PATTERN AT 1600 FT ON A 45 DEG MIDFIELD L DOWNWIND FOR RWY 18R AND BROADCAST; 'COLUMBIA STATION TFC; THIS IS CITABRIA XXXXX ON A MIDFIELD L DOWNWIND FOR RWY 18R COLUMBIA STATION.' I CALLED OUT BOTH MY BASE AND FINAL ON THE CTAF. I CLRLY REMEMBER SCANNING BEFORE TURNING FOR FINAL BECAUSE OF SEEING THE CESSNA IN THE AREA. I NEVER SAW THE CESSNA AGAIN; NOR ANY OTHER ACFT IN THE TFC PATTERN BEFORE THE NEAR MISS OCCURRED. I TOUCHED DOWN ROUGHLY 200-300 FT FROM THE APCH END OF RWY 18R AND WAS SLOWING DOWN TO ABOUT 25 MPH WHEN; THROUGH THE SKYLIGHT OF MY CITABRIA; I WAS STARTLED TO SEE THE TAIL OF A CESSNA 152 ABOUT 10 FT DIRECTLY ABOVE ME. HE TOUCHED DOWN ABOUT 25 FT IN FRONT OF MY STILL ROLLING AIRPLANE. MY FIRST THOUGHT WAS THAT HE MUST HAVE SUFFERED AN EMER ENG FAILURE TO BE FORCED TO LAND ON AN ACTIVE RWY. I STOPPED MY ACFT AND ANNOUNCED ON THE CTAF; 'CESSNA ON THE GND AT COLUMBIA STATION ARE YOU ON FREQ?' THERE WAS NO RESPONSE. THEN THE CESSNA TURNED AROUND TO BACK TAXI. WHEN HE SAW ME STOPPED IN FRONT OF HIM ON THE RWY; HE TAXIED OFF OF THE RWY TO HIS R ONTO THE GRASS IN AN EFFORT TO TAXI AROUND ME. AT THAT POINT I NOTED HIS N NUMBER; AND CALLED OUT; 'CESSNA XXXXX AT COLUMBIA STATION DO YOU WANT TO PULL OVER TO DISCUSS WHAT JUST HAPPENED?' THE FIRST AND ONLY XMISSION HE EVER MADE WAS; 'YES; I'LL PULL OVER.' I TAXIED MY ACFT TO THE RAMP AND SHUT IT DOWN; AND HE FOLLOWED. THERE WERE 2 MEN IN THE CESSNA. I WAS LATER TOLD BY THE FBO THAT ONE WAS A FLT INSTRUCTOR; THE OTHER A STUDENT. THE STUDENT WAS OCCUPYING THE L SEAT. WHEN I QUESTIONED THE MAN; WHO I BELIEVE WAS THE FLT INSTRUCTOR; ABOUT THEIR FAILURE TO USE HIS RADIO IN THE PATTERN; HE MADE A COMMENT ABOUT THE RADIO BEING INOP OR UNRELIABLE. HE ALSO MADE A COMMENT ABOUT MAKING SOME TYPE OF ABBREVIATED APCH TO THE ARPT. AT THE TIME; I ASSUMED THEY WERE PRACTICING DEAD STICK LNDGS. HE ACCUSED ME OF MAKING A STRAIGHT-IN APCH; WHICH I DENIED. WHILE NEITHER THE FLT INSTRUCTOR NOR THE STUDENT WAS BELLIGERENT; THE TONE OF THE CONVERSATION WAS BECOMING ACCUSATORY; AND I DECIDED TO TERMINATE THE DISCUSSION BEFORE IT DETERIORATED FURTHER. AS I WALKED BACK TO MY ACFT TO TAXI BACK TO THE HANGAR; I NOTICED ANOTHER 4G8 HANGAR LEASEHOLDER WHO WAS SITTING WITH ANOTHER GENTLEMAN IN HIS AIRPLANE NEAR THE FBO OFFICE. HE HAD BEEN WAITING FOR THE RWY TO CLR. I DID NOT QUESTION EITHER OF THEM THAT DAY AS I WISHED TO PUT MY AIRPLANE AWAY; AND WAS TOO UPSET TO THINK OF IT. HOWEVER; THE NEXT AFTERNOON; I RETURNED TO THE ARPT AND QUESTIONED BOTH MEN AS TO WHAT THEY MIGHT HAVE SEEN. THIS IS WHAT THEY TOLD ME. HE HAD SEEN ME DEPART THE ARPT THE DAY BEFORE ON RWY 18R. LATER; HE SAW THE CESSNA DO A SERIES OF DOWNWIND LNDGS. LATER; HE OBSERVED THE CESSNA ENTER A L DOWNWIND FOR RWY 18 BEHIND ME. HOWEVER; THE CESSNA WAS AT A SIGNIFICANTLY HIGHER ALT THAN PATTERN ALT. WHEN THE CESSNA WAS ABOUT 1000 FT OR SO FROM THE APCH END OF THE RWY; ON A L DOWNWIND FOR RWY 18R; HE TURNED L 90 DEGS; CROSSED THE RWY AND ENTERED A R DOWNWIND FOR RWY 18R. HE PROCEEDED TO MAKE A R BASE AND TURNED ONTO FINAL. THE LEASEHOLDER MENTIONED THAT HE COMMENTED TO HIS COMPANION THAT HE THOUGHT THE PLT OF THE CESSNA WAS CRAZY. HE SAW THE CESSNA LAND ON THE RWY DIRECTLY IN FRONT OF ME.