This doesn't add up. The "blade" is an abrasive disk from an 8" angle grinder. A brush cutter doesn't spin super fast and those blades are relatively light (and totally impractical for cutting grass or wood). If such a blade was used and broke, only a fraction of the kinetic energy of the spinning blade would be converted into linear kinetic energy. It is highly unlikely that a portion of an abrasive disk (which is not sharp in any way) would even cut through his pants, let alone totally sever his dick. And, even if it did, your natural response would be to apply pressure to the area to stop the bleeding. None of this passes even a cursory critical examination. I'm going to call bullshit on the whole thing. It's fake.