I like it when that dude from Maximum the Hormone screams... : http://www.youtube.com/watch?v=BNzu237bibM
or Japahari: http://www.youtube.com/watch?v=PGdxuiWeW5g (It says it's by MtH, the kid who made the video failed and mixed up Japahari with Maximum the Hormone. If you listened to both, they actually sound NOTHING alike... >_>)