The thunder roared as rarely seen.

I was scared because there was thunder last night.

This ramen is very spicy.

I use strong flour to make bread.

Please use the emergency stairs in case of a fire.

Due to the earthquake, the city declared a state of emergency.

Mercury(II) fulminate is a very sensitive explosive and needs to be handled properly.

In organic chemistry, fulminic acid is produced from carbon monoxide and ammonia.

This building is equipped with lightning protection, so there is no need to worry about being struck by lightning.

He avoided standing under the tree to avoid striking lightning.