If you thought the weekend was a good one, wait to you see the latest teased trailer for SGtMarkIV's Doom mod of Brutal Doom V20. Unlike the previous trailer which gave you all the bloody effects you could want for this retro gaming classic, in this trailer the developer is showing off the new Bullet Penetration Physics that will be available in V20. That's right, you can actually shoot through doors and walls if enemies are on the other side, a feature not seen in the original doom classic! Is that good or what?