Well now that there is a boulder possibly blocking the tunnel that forked behind us, unless we find a tunnel that connects to one of the other ones we didn't choose when we started on this journey, then our way out is insecure. Though I'm pretty good with a crowbar, I could probably smash the boulder randomly about 4 or 5 times and it would break just like in Half-Life 2! But anyways, there's a conveniently placed boat here by the lake. *Pokes it*