A few weeks ago when I was writing about Full Sail Session Lager, I had my wife take some pictures of my favorite party trick: opening a twist-off bottle with my forearm.
You'll have to take my word for it that the bottle was open. I wish the cap had stuck to my arm for that last photo, instead of exposing an alarming vortex of puckered skin. Good lord, am I that jowly? Don't worry, you can almost always do this without breaking the skin at all. The Internet supplies us with this unillustrated how-to. My technique is a little different: I hold the bottle in my left hand, and open it by pivoting my right arm counter-clockwise from the elbow.
Of course, there aren't that many West Coast snob-worthy beers that come in screw-tops. Lagunitas is the only one I can think of off the top of my head. [Update 2009/04/30 (and later): Full Sail, Terminal Gravity, Hale's, Alaska Brewing, MacTarnahan's.] Are Bridgeport sixers twist offs? Opening a growler with your forearm isn't very dramatic.
My trick isn't so great when you compare it to this:
The guy sniffs the bottle! Dude, you need to find the bottlecap!