I can bet oyu money he was beating on it and shifted into lets say 2nd rather than 4th. (Happened to a buddy of mine)
I hope you friend has deep pockets
So you are saying that you know someone that knows someone that shifted from 3rd into 2nd instead of 4th and the result was a broken cam bolt? Please elaborate....
Every single cam bolt failure I have seen so far (three recently, four total) was a result of metal fatigue or the cam bolt backing out. None of them were the result of high rpm abuse.