Why beer suddenly foams up when you tap the top of a bottle

Name: Why beer suddenly foams up when you tap the top of a bottle
Uploaded: 2024-08-06T22:19:07Z
Description: If you tap the top of someone's beer bottle with the bottom of yours, it instantly creates a beer foam volcano. So what's causing this?

If you tap the top of someone's beer bottle with the bottom of yours, it instantly creates a beer foam volcano. So what's causing this?