A fifth bear-thing wanders into sight just long enough for Sean to snipe it in its shoulder plates.

It is not enough to knock it down or kill it, but it does communicate the message; "Leave now, or die with your fellows."

Meanwhile, the creatures still capable of movement finally take the hint and start running away as best as their pained bodies can take them. They have realised just how dangerous this place is, and are getting out before they pass out bleeding.