Upon seeing the weapon, you realize that you're in over your head. You guess that he's here for the girl, and you're not likely to stand a chance against him with him armed like that. You back away several feet, glance once at the girl, who is not looking at you any more, then turn and run.
You turn the corner, and as you do hear the girl howl something in that foreign language. You start to slow down, perhaps she needs help, but then another scream comes that overrides your thinking, and your instincts kick in. You run for your life. You don't know if the man killed the girl, or the man was coming to kill you, but that scream meant you need to leave, and fast!
You don't bother to breathe, you just run. The tunnel which once seemed so deep takes very little time to traverse when running for your life. Within moments, you blast out of the tunnel opening and slide to your backpack, holding it up to defend yourself.
You look into the cave, but can see nothing. It is very quiet also. You listen for more screams or footfalls for an entire minute, but hear nothing. Either way, you decide that this was not the adventure you were looking for on your vacation. Turning around, you glance back once at the tunnel, then head back to the village. It is disappointing, but you're alive, which is not something you can say for the two you just encountered.
The End.