Johannes now has something to tell people about what he does with his time. Since it doesn't sound very sophisticated to say, "Playing World of Warcraft and mooching off my parents," he has made up something about studying Econ at Caltech, but obviously none of us believe that nonsense.
Johannes can play a better game of DDR after appendix surgery than most folk can play, well, after not having appendix surgery.
Oh, and we can't forget his time in the Elizabethans and Berkshire Symphony Orchestra... He's one of those brass players. You know the type.