In what situations can laughter be especially helpful? Why?

Laughter is good basically in any situation. Laughter is an ice breaker in awkward situations. If someone cracks a joke here and there at a meeting, it lightens up the atmosphere. Clearly laughter at a funeral wouldn't be very respectful, but some find it a way of remembering the positive things of the deceased. Laughing along with others in an embarrassing moment can make people feel more comfortable about what just happened to them.