My Dark Side

Alright, this involves a little participation from you.
1) got to http://www.youtube.com/watch?v=oGT0r-udstQ and go to 16 seconds, pause, and mute the video
2) go to http://www.youtube.com/watch?v=ZThquH5t0ow in a different tab, put it on full volume, and play
3) quickly switch to other tab, play the original video
4)???
5) Profit

Sorry in advance to people with this.