Sam just came in time to watch the head fall on the ground. He looked at the Wight commander, but didn't stop there. He just went in to see What position his friends are in.
There are no serious injuries and everyone managed to stand up. Jack is the only one who fainted due to blood loss.
Sam fed some wine to him and left his care to the rest of his friends after he confirmed there is no critical damage.
He is really relieved they managed to survive for a while. He didn't think that someone would find this place this fast, he thought he was prepared. But from the looks of it the preparation was not enough.
He finally has time to think about the people that entered this place. As for the sudden attack Jack used, he would think about it later.