It could be Prof. Hawking's habit of backing something both ways.
i.e. If the LHC finds something, he loses $100 but gets the joy of CERN having discovered something. If CERN fails to find anything, at least he gets $100.
He did something like this for his black hole theory (a complete set of the Encyclopaedia Britannica vs. a year subscription to Playboy IIRC).