I have my own story of embarssing moments. I was giving my Gold Cup a through cleaning in my early days in IPSC (1991) and put her back together, cycle checked it, dropped the hammer, etc. all was well.
I was called to the line and instructed to 'Load & Make Ready' , I drew my GC, got a hold of a mag , and tried to insert it, , only took me 30 seconds to figure out I put the mag well on backwards (one of those with rabbit ears.
Needless to say, if I do a detailed strip, I fire the gun before showing up at a match.