IDK but I wouldn't have really believed it, if I hadn't actually seen him do it... Some say LSD, but I don't know. I think its really just the power of his mind. And he's also very spiritual, so maybe there's some meditative aspect to it. Its inspiring to myself as a dj, and I think of that whenever I get tired of mixing after a few hours, 'Just keep going, Gil's more than 50 and he goes for a whole day...'
Congratulations, Torsten and Iselin!