Imperial Stout Blowing Off

Imperial Stouts are notorious for having massive blow-offs. My wife got me an Imperial Stout all-grain recipe kit from Midwest Supplies for Christmas, and I had some time shortly after Christmas to brew it up.

It’s still fermenting, but this is what was happening roughly 18 hours after pitching 2 packets of S-04:

By the time all was said and done, I lost roughly half a gallon of beer into the bucket.