Dubstep Beatboxer[youtube] first time hearing…umm beatbox dubstep? actually dupstep alltogether[/youtube]
Epic! 
Listen to this.
Illegal Bass Tester
Turn up your speakers or whatever after the song starts. 
Edit: Here is another one that is pretty cool.
Ultimate Bass Song(UNIQUE TRACK IN THE WHOLE YOUTUBE)
WOW, people are so skilled.
BTW: LOVE THE DROP