Chris's house after he started pouring his stout...
[img:29gtzigk]http://www.cavandj.ie/images/rnp-party-foam.jpg[/img:29gtzigk]
From the tour of the Well and other things if you want a nitro head on your stout, you don't carbonate it at all, but rather force nitrogen into it. Which you can't do at home too easily.