"I'm gonna need you to stand back" is a red text properties modifier on a Shotgun in Borderlands 2
Found on the following red text Shotgun: Omen, such as the New and Improved Omen from Tiny Tina's Assault on Dragon Keep DLC
Grants Weapon Effects[edit]
Shoots 9 pellets in circular pattern
Last pellet in center converges and expands as it travels
Consumes only 1 ammo per shot