National park experts are unsure how long the volcano will continue to erupt, spraying vibrant lava and rocks into the sky.

CNN: Congo's erupting volcano boosts tourism

He would erupt like a volcano if he felt the editorial department was becoming complacent or falling into a dull routine.

FORBES: James W. Michaels

More than once, in my early years here, I saw Michaels erupt like a volcano when he thought the staff was getting complacent or had fallen into a dull routine.

FORBES: Fact and Comment