A foraging party of Tiny Folk
The Tiny Folk observe you silently for several minutes from beneath the brims of their caps. Three of them perambulate in a circle around the group and then in unison they march off into a tunnel no taller than the collar of your boot. The last to enter pulls down a woven flap over the tunnel entrance, rendering it nearly invisible against the surrounding rock, and it is as if they were never there at all.