But to say that playing a track to its break, stopping it and starting from the beginning again 10-20 times definitley does not double the energy, in fact, it tires the track out. Maybe kids these days just like it that way, i dunno, but it sounds stupid to me. You must be on some good shit to be enjoying that. As for playing 20 hours, yes you have to work tracks, but 40 minutes - 90 minutes isnt working a track, its just wasting time, there are many djs that play marathon sets who don't play tracks for 40 mins+.