Instructions
Obtain a high-powered weapon that exerts a large amount of force when used. You may have to search the level for one of these weapons. Some of the better weapons to try include the rocket launcher, sniper rifle or Brute gravity hammer.
Line up a shot by standing between the traffic cone and other players. Take care when using explosive weapons so you don't take damage yourself.
Fire at the traffic cone to launch it at a high velocity toward enemy players. The faster the cone travels, the more likely it will hit with enough force to kill a Spartan or Elite. If the cone bounces off a player, you need to find a way to apply more force to the cone to launch it harder.