Guinea pigs 'popcorn' as a sign of happiness and excitement. It's a joyful behavior where they jump and twist their bodies in mid-air. You might notice them doing this when they are out of their cage, playing with toys, or interacting with their owners. It's a way for them to release their energy and show that they are happy.
Another super cute video of Myron and Stanley from @scooterk19 Truly happy popcorning piggies!