when you let your hand and arm get real ashy like turtle skin, then you jam your arm up somebodies ass and when you rip it out it cuts their asshole causing to bleed.
i was at the world series cheering my yankees on, when a phillies fan(asshole) stood up and said the yankees suck. so i did what any other yankee fan would do, i gave him the ninja turtle special
by ninja turtle special November 4, 2009