listening to Avenged Sevenfold - A Little Piece Of Heaven, familiar with it? Well I just listened to to for the first time and it reminded me of another song (Oingo Boingo's "Nasty Habits", of course.)
I'm no expert and it's probably just some convention for that tone/style...but here you go, a link to one of the similar OB bits i'm familiar with:
http://youtu.be/NzhtHERoUog?t=3m4s
and the a7x bit:
http://youtu.be/VurhzANQ_B0?t=3m16s
There are others such as the rapid chanting but I don't want to ruin the fun for you...
Your thoughts?