Martin O'Donnell easter egg

There is an easter egg of Martin O'Donnell in which he is dancing around in a fighting stance, this can be found on the level Kikowani Station by flying your banshee on legendary to the first area where you encounter anti-air wraiths. Then following the right wall until you reach the side with the large red electronic sign. Fly to the bottom, get out, and go up along the left wall until you reach the top, then jump down to the small ledge, wait a few seconds until the picture appears then if you back up to the door on that ledge, you can hear the song "Siege of Madrigal" too.