Call of Duty: Modern Warfare 2 Easter Egg - Infinity Ward Rock Fest Starring...

In several areas in-game, there will be frayed flyers on the walls. Keep an eye out for a purple flyer. It reads : "Infinity Ward Rock Fest". It also has a singing black man, who is named Griggs. This is a reference to Sgt. Griggs in CoD4, who in the credits, raps.