User blog comment:GoldenKnight/Is Riot Shield Boostiong Cheating?/@comment-1762799-20091222175617

I've done it once before. Its when you and a friend of yours take turns shooting at each other with riot sheilds. I beleive this gives you XP b/c not only does the game give you 100 XP for it every 5 seconds or so, but it also gives you challenge accomplishments for it which gives you more XP.