When Sam was certain that Dean was in a secure position, he gave the door a try. It didn't budge. Fighting off a scowl, he slid a hand into his pocket and pulled out the lock-pick set that he had tucked away there earlier. Flipping it open, Sam took a brief moment to pick the lock open, then he quietly shouldered the door open and peered in through the dimly light corridor that lay beyond the back entrance. A light perched up on the wall flickered at a constant rate, which was something that any given normal person would have blamed on the lighting in itself. Sam knew better. Supernatural beings made lights go all frantic when they were around. Whether it was on purpose or not really didn't matter to him; it was a sign that they hadn't been too late and it encouraged Sam to quietly creep his way through the doorway and into the shadowy corridor. Shotgun raised in front of himself, he advanced forward. Sam listened carefully with each step that he took, only coming to a halt when he reached the first room. Back finding the wall, Sam glanced over at his brother and signaled for him to move around to the other side.
Just as soon as his shoulder twisted against the wall so that Sam was able to peer into the room ahead, Sam heard a pair of voices drifting out from down the hall. He took a quick moment to make sure that the room was clear before pushing away from the wall and sneaking further down the corridor. The voices grew louder as he moved, echoing off the walls from the very last room in the corridor. Sam tightened his grip on the shotgun, body tensing as he got closer. Just as he was about to take up his position on the wall as he had before, the voices went silent in an abrupt sort of way.
Either they had left the room, the conversation had been unappealing, or they knew that something wasn't quite right.
Sam didn't bother waiting to see which of the three was more likely. Feeling both desperate and impatient, Sam darted into the room without so much as giving Dean a passing glance. It was a stupid and reckless move to have done, but Sam wasn't going to wait for them to surprise Dean and himself first. The result ended with Sam stepping into a room (it was sort of bare - there were a few wooden crates lined up against the wall, a couch with stuffing coming out of it's ends, and a dozen chairs nestled around a table) of five figures, all of which were staring him down with black eyes.