Construct

From MLGWiki

[edit] Purple Room Escape

When you are in any of the "purple elevator"-rooms and you know you will die if you don't get away quickly. Just run to where the 2 battle rifles is in the end of the room and jump off the outer, far edge. You will not die, because you will end up at the very bottom of the map where the Spartan Laser is. And they will not follow you since they probably think you fell out of the map and they would get the kill.