yell into the darkness
You decide to yell into the unending darkness infront of you. You
hope that maybe an echo will help you determine how deep the cavern
really is. You muster up enough courage, and bellow at the top of you
lungs, "Hello, is anyone there?" You wait patiently for the
echo of your voice to be carried back to you on the walls of the rock
cavern. Nothing! Not even the trace of a sound. Then all of a
sudden.......
