Cool things

In case you are wondering the trick, what you do(we did it on coagulation)is make a sword match, one person get in a warthog one person get in a ghost, meet on one side of the level, one person gets in passenger seat of warthog, other person gets close enough for the passenger to lunge, but the passenger should stay in the warthog, other player goes to other side of the level, passenger gets out of the warthog while still holding the button, jumps across the whole level and slices the other person.

Also, you can get a sniper rifle/sword, zoom with the sniper, get the reticle to be red, switch weapons really fast and lunge from far away.