The room was filled with sad asses.

Sad to say, I didn't pass the exam.

She walked into the room with a sad-faced expression.

It's a sad case that he lost his job.

The sad pandas looked lonely in their enclosure.

The sad panda sat alone in its enclosure.

There are many sad cases in the world.

The sad tree stood alone in the empty field.

The sad trees in the park drooped their branches.

Sad trombone sounds are often used to express disappointment or failure.