The reason he fucked up two moonsaults in that match was cause he actually gave himself concussion on the first moonsault.
If you watch the match again you'll see how off balance he was after that moonsault.........more power to him for continuing!

I do remember him having a particulary bad match against Jeff Hardy,but Jeff was just as off his game in that match as well!

Everyone has off days anyway,nobody can be 100% all the time!