How to Use "laughing" with Example Sentences

1. Am I laughing at the actors or with them ?

2. They played all afternoon , laughing at each other 's responses .

3. We could hear the policemen laughing .

4. Also , when people are laughing at your jokes , you immediately gain social status which is attractive .

5. So , as a supporter of the efficient markets theory , I thought for sure the market would fall down laughing .