A Fright in the Shroom-Light

[mopzee]

It's just a cave, if anything, you might find a few bats or bugs, it's nothing to worry about! Right?
Journeying through the cave, your nerves are put at ease as you stumble upon a section lit with a warm, albeit a touch eerie, glow of the cave-fungus. You stop for a moment to rest and consider having a bit of a snack before continuing, until... deeper through the passages, between the wet drips and low light, you hear a low rumble and the all too familiar sound of something organic sliding across wet stone.
Something... BIG, just moved. And you're pretty sure that wasn't a bat!