Considering the short time he's been working here, the noises around him still manage to unnerve Greggory. When he see's the form at the end of the hall, however, his mind immediately gets to work and he searches his pockets for something to help.  He pulls out a collapsable...well, its little more than a bag, really, but it seals the top of his lab uniform, and combined with a pair of sealed gloves, should isolate him from just this sort of vaporous or loose-particle creature.  He also pulls out a flashlight and shines it down the hall, trying to illuminate the form. "Whatever you are, I won't let you harm any of the other patients.  I suggest you return to where you were."  His voice shakes a little under inexperience, but his hand is steady and his back straight.