It's called cavitation, said the leading researcher in the study, Javier Rodriguez-Rodriguez, of Carolos III University in Spain, The Daily Mail reported. That's the process by which bubbles suddenly appear in a bottle of beer that's been tapped or .... Why tapping the top of a beer bottle produces a geyser of foamArs Technica Science Of Blasting Beer Finally ExplainedRedOrbit Beer Tapping Frat Party Prank Explained: The Physics Behind Overflowing FoamInternational Business Times University Herald -LiveScience.com -Science Daily (press release) all 30 news articles »