"All of a sudden, he turns in your direction, grunting "What's that ruckus?" You briefly consider asking him to describe the ruckus, but decide instead that discretion is the better part of not getting your skull cracked. You climb up through the acoustical tiling and start making your way back toward the entrance of the cave.
"On the way, you start making up a joke about a cave with acoustical tiling, but you don't quite make it to the punchline before you lose interest."