http://www.youtube.com/watch?v=cDhjKtuMxf4&feature=youtu.be
Yes this can be used in Matchmaking, I discovered this as I saw people use it in flood mode.
Just posting this in hopes 343 patch this in the future
same ive seen multiple people get in this and earn more EXP for surviving. 343i if you ever see this PLEASE patch this as more and more people lose out on EXP because some Call of Duty fans cant be bothered to play by the Rules. And not saying ALL Call of Duty fans are like that some are good guys n gals but some are utter nonces.