Buzz·Posted on 6 Jan 2014This Timelapse Video Is Proof That Your Beer Is AliveOr at least it was. Scary stuff.by Kelly OakesBuzzFeed Staff, UK LinkFacebookPinterestTwitterMail Just look at this beer bubbling up over the edges of an open fermenter. Tap to play GIF Tap to play GIF The full video follows an ale rising and falling as it ferments over six days. View this video on YouTube Sierra Nevada / youtube.com Yeast creates this effect as it breaks down the sugars in the barley and hops mixture. But don't worry, the yeast is filtered out before the beer is served.