I have heard it referred to as a "third leg" before, but never a third arm. The orc must be french. And shouldn't it be green? Oh wait... that's a trophy, I'm so dumb. Actually this is a really bad-ass model. If I'm not mistaken most of these bits are regular old plastic bits from the orc box right? This is very nice. Just goes to show good creativity can make any old bits look cool.