Žižek : Is this digital democracy, or a new tyranny of cyberspace?

Slavoj Zizek (without accents) criticizes cyberspace, referring to "Person of the Year" (The Time Magazine), at The Guardian (30.12.2006). Concludes :

And therein lies the threat of cyberspace at its most elementary: when a man and a woman interact in it, they may be haunted by the spectre of a frog embracing a bottle of beer. Since neither of them is aware of it, these discrepancies between what "you" really are and what "you" appear to be in digital space can lead to murderous violence.

"A frog embracing a bottle of beer" -- Where does this metaphor come from? Is it just a beer label?