He suddenly stood up.

I was surprised by the sudden evening shower.

When it snows, the whole town turns white.

Suddenly, it started to rain.

It started raining all of a sudden.

While playing in the park, we encountered a sudden evening shower.

The elevator descended to the basement.

That disease is caused by a mutation.

Hehe, that joke was funny, wasn't it?

He was mumbling something fuga fuga.