This can be done on Mission 6 Hunting Party. This video will show all six possible locations. The first being right at the beginning of the level to the left. Make sure to stay back because if you get too close it can kill you or your teammates. Second will be once you bust into the turret gunner house. Third will be around the corner in the hospital once you go through the blue door. Fourth will be on the left side of the hallway when a turret gunner is shooting at you. Fifth will be right before you do the snake cam and the final one will be before you flank around to get the wolf.