As Sylux, get into Lockjaw. Set two bombs and have someone run into them, then get close to the person. When the two bombs are attacking them, lay another one. As that one goes toward the person, remember where the first two were before you lay another one. Finally, move into the triangle position and lay a bomb. This should be an automatic kill.. Note: Be precise and quick. If the person jumps during this, it will fail.