Omigosh! Those are both hilarious!
The first one reminds me of a record that came out in the 50s; I was just a kid, but I remember hearing it when my family was visiting with another family, if I remember correctly. The host put on the record. It started with the sounds of people at a cocktail party--voices, glasses tinkling. Then a woman giggled. Then someone else giggled. It just escalated until everyone on the record was roaring with laughter. It was impossible to listen to that record and not laugh.
Judy