In the singleplayer mission ‘Tashgar’ you fight your way from behind, through enemy forces to reach a US base. Once you reach the US base you make your way down an alley, along this alley you come across two soldiers multiple times, standing to the side. When you wait next to them for long enough they will start a conversation. These conversations aren’t the easter egg, reather the voice actors that play these soldiers. They are the voice actors for the Machinima series ‘Battlefield friends’.
Three of these short but funny conversations can be found in this alley.