I was at Troy Todd's house on Friday and we played Halo 3. Besides being the sensation that's sweeping the nation, Halo 3 is also filled with physics. I ran toward Nick (teh pretty pwny) as i shot him with my assault rifle. When i was near enough, i pressed B and beat him down. In Halo, beat downs are incredibly strong. You can shoot someone in the face with a machine gun for a long time and they won't die. However, if you hit them in the back with your gun, they will die instantly. Anyway, when i hit Nick with my gun his dead body flew across the map. I thought to myself, 'wow, with the mass of the gun being so small compared to the mass of his body, the gun must have been moving incredibly fast to fly Nick's massive body across the map'. Momentum conservation is fun!