I call my friends to grab the packs, and if we have time, lash a rope around that nearby tree and run it into the cave while we all take shelter as far back as we can.
With the four of us, it might be a tight fit. The rope will give us some safety in getting around the pit (or into the pit). But if we're safe enough to hunker down away from the entrance and the pit, we will.
You go deeper into the cave, around the pit - and safely, as well. However, not for long, as there is a growling sound coming from deeper into the cave. A great, bipedal reptile-man is standing in the tunnel that leads downwards, and he has a spear with a stone tip in hand. He roars threateningly at you, and gesture angrily with his spear.
What do you do?
Cheers!