The five creatures on all fours were wildly slamming into the stone bricks.
They clearly possessed extraordinary jumping capabilities and physical fitness, able to leap vertically from a standstill and hit the lower section of the bricks with their backs.
"Huh? How interesting. What kind of underground creatures are these? They're quite strong." Fars places his hand on the slightly trembling ground tile:
"Look. They're loosening the tiles by hitting them, and the cement in the gaps is about to crack."
The clear sound of the impacts from below echoed throughout the room: "clang, clang, clang..."
Cigarette in mouth, Kent, the night watchman, walked in, exhaling smoke and asking:
"What's going on, mates? It's late, and none of you are sleeping – holding a storytelling session?"
"Boss, Fars says there's something underground hitting the tiles." Mark runs his hands through his hair.