Turn Black on Crow's Nest

There is a glitch that can be done on Crow's Nest that will turn you and your weapon completely black.

Where to go
After you go to the part outside where you have to fight the Jetpack Brutes and clear the area for the Pelican. Go through the door and you will start going up stairs. One of these sets of stairs will have the top two steps missing and there will be just blackness there. You stand there and you will be completely black.