A Doomed Pilgrim in the Ruins of the Future

The smaller spiders swarm your feet as the large one raises itself up and approaches. It appears to be intent on engulfing you with the large toothy, undulating orifice on its underbelly.

They're all in some kinda laughter and it's unnerving and stuff.

I continue to back away, kicking and stomping at the spiders as I go. I shoot glances over my shoulder, evaluating the terrain and weighing my options. What's the best position here that I could take?
Anyone should answer.