Eli5: Why does a bottled beer explode out when tapped on top by another bottle?

Question

I’ve been afraid to ask this even though it has happened to me several times in my life. I just laugh and try to alleviate the mess where I can.

In: Physics

Answer 1

Mark Rober has a great video explaining it on YouTube, essentially a vacuum forms in the bottom then collapses 10 times quicker than it formed creating a shockwave that cracks the glass.