Gyberish keywords will require an initial high CPC because Google have no historical basis on which to forumulate the quality score for that keyword. As soon as you start getting clicks in line with expected parameters the price will come down. If you don't, then Google's initial concerns that the keyword may be of low quality will be confirmed and the price may remain high and possibily increase.
The keyword I mention in this message is not the correct but this was just an experiment. I actully found the same behaviour with good keywords as well.
The "biometrics clock" is one of them.
I observed various face CPC values for in this catagory.