Why Does Bonking Beer Bottles Trigger a Foam Eruption?
It's the classic party prank: smack your beer bottle on top of someone else's and watch as their bottle wells over with a seemingly endless river of foam. As it turns out, the prank has some interesting physics behind it. Scientific American editor Michael Moyer explains.
Edited by Kathryn Free and Eric R. Olson
Produced by Eric R. Olson