Start a multiplayer game by yourself. (If you include features such as Personal Logos and Extra Players, it may degrade performance, and may remove this Easter Egg).

Set to ‘Assault’ mode, on a map that has a ledge you can position at eye level.

Once in the game, pick up the bomb. Place it on this ledge which is at eye level, and position it so it can be viewed.

If the correct side of the bomb is facing you, it should say: "Kiss It Goodbye".