The sound of that shriek wasn't something he was going to forget in a hurry, it set his nerves on edge and sent a shudder down his spine. An uncomfortable knot formed in the pit of his stomach, something was definitely very wrong.
Considering the current epidemic, or pandemic or whatever it was, currently sweeping through the others it would probably have been smart to remain on this side of the door, or at least to try and find out if it was safe before entering. Sam did not wait. Against his better judgement he tried the door and when he found it unlocked he cautiously moved to head inside.