Shake, then barely crack it open. LHBS warned me well, and I treat my vials like they are bottles of soda that were just dropped, but still need to be opened.
crack it fast but barely open enough to 'hiss' the pressure out, then you're golden.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10