For those with the Wild Wasteland trait, upon entering the cave, an eerie noise and a special Pip-Boy icon will appear, denoting the presence of an Wild Wasteland event. Entering the cave the ghost of a prospector may be seen entering and running around until he is killed by one of the many rodents of unusual size or the player, who will receive 25xp upon the kill but the corpse will disappear soon after.
Does it mean a ghost or what?