Right now everyone of those people also begin to use some kind of similar technique Like The Spiritual vision and while they observe their comrade they could also see a different type of aura trying to invade his body. Most likely because of a situation like this happening and everyone became very afraid or you can say what it is about their friend right now.
But unfortunately for those people they were unable to see what Sam was now able to see. At this time while using the spiritual vision he could see that most likely some kind of Monster or something similar was trying to take over the body of that person and because of that something like that happening to that Warrior. Naturally it was a ghost like Monsters that was trying to possess the body of that Warrior.