When is the last time you caught a bad case of the giggles? What caused it?

When is the last time you caught a bad case of the giggles? What caused it?
I was at a wedding with my best friend for our two HS/college friends who were marrying each other and the ceremony was half in Vietnamese (which we do not speak), half in English. The groom, though Vietnamese barely understands Vietnamese, so his best man (our friend as well) was supposed to help him with translations, but being hilariously pure evil, he didn't help translate and so the groom was just looking confused looking pleadingly at his best man who was just smiling and softly laughing which made us laugh. Then mid ceremony, one of the priests told a joke in Vietnamese, and my best friend starts laughing, and I looked at her, and whispered, "you understood that", and she looked me in my eyes, and went, NOPE! This led to our uncontrollable giggles for the rest of the ceremony. It was awful, we could not stop laughing. We were both in tears from trying to continuously suppress our laugher and the scene unfolding in front of us with the groom looking around confused not understanding most of the ceremony.
When is the last time you caught a bad case of the giggles? What caused it?
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