Narrative:

After 5 turns in the patten, instructor and I landed and decided to roll to the end of the runway instead of using heavy braking to make the taxiway turnoff. I made a radio call to unicom saying we were rolling to the end of the runway. At that time the landing gear seemed to collapse. I was looking outside to the end of the runway, so it is very possible that I reached for the throttle and pulled the gear up handle instead. The incident happened so quickly that I don't remember what happened, but looking down to verify where my hands actually were may have prevented this from happening.

Google
 

Original NASA ASRS Text

Title: INSTRUCTOR WITH COMMERCIAL PLT STUDENT, EXPERIENCED THE NOSEWHEEL COLLAPSE OF C172RG DURING LNDG ROLLOUT. SUSPECT STUDENT INADVERTENTLY RAISED LNDG LEVER.

Narrative: AFTER 5 TURNS IN THE PATTEN, INSTRUCTOR AND I LANDED AND DECIDED TO ROLL TO THE END OF THE RWY INSTEAD OF USING HVY BRAKING TO MAKE THE TXWY TURNOFF. I MADE A RADIO CALL TO UNICOM SAYING WE WERE ROLLING TO THE END OF THE RWY. AT THAT TIME THE LNDG GEAR SEEMED TO COLLAPSE. I WAS LOOKING OUTSIDE TO THE END OF THE RWY, SO IT IS VERY POSSIBLE THAT I REACHED FOR THE THROTTLE AND PULLED THE GEAR UP HANDLE INSTEAD. THE INCIDENT HAPPENED SO QUICKLY THAT I DON'T REMEMBER WHAT HAPPENED, BUT LOOKING DOWN TO VERIFY WHERE MY HANDS ACTUALLY WERE MAY HAVE PREVENTED THIS FROM HAPPENING.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.