All of a sudden, she began to laugh.

She was on the point of laughing at the clown's actions.

The moment she saw me, she began laughing.

She burst into laughter.

They broke out into spontaneous laughter.

They broke into laughter.

He burst into laughter.

At his joke, they all burst into laughter.

All at once they began to laugh.

The girls burst into laughter when they heard his joke.

The girls burst into laughter when they heard his joke.

I burst out laughing in spite of myself.

At my joke, the audience burst into laughter.

Don't burst out laughing like that. It's creepy.

Everybody burst into laughter.

When they heard the story, they burst into laughter.

The young man burst into laughter.

Hearing the joke, he burst into laughter.

The gesture fetched a laugh from the audience.

John burst into laughter when he was watching TV.