nix besonderes...
kannst englisch? steht in dem comments, wie das geht...
hier:
There's nothing super about it, its standard physics. Energy is introduced into the system in the form of Kinetic energy (when they are tapped together) which triggers bubbles to form around small particles. These bubbles take energy out (Heat) when they form. The system is at freezing temperature, so the beer instantaneously freezes...
also ales rein physikalisch!