A2A

You can call it a nervous laughter

• Try to concentrate on something that is boring
• Try coughing if you are not able to control your laughter as to to disguise your laugh.
• Try to concentrate on your breathing.Try stopping your breathing for a few seconds as it will create distraction
• Try pinching yourself
• Think of any sad incidence that happend in your life
• Start counting backwards from 100 or backward ABCD in your mind
• Try tightening your abdominal muscles
• Do meditation and deep breathing exercises in the morning

Good Luck