human
Write a detailed description of a dangerous scene inside a cave cavern with a bellows, crucible, and coal.
assistant
Showers of angry red sparks fly from the fires raging beneath a large black-veined crucible that hangs from a hinged wooden beam so it can be swung on or off the flames as needed. Nearby, a bone-handled leather bellows hangs over a pile of glossy black coal slumped against the cavern wall.