I have had 2 mishaps too. 1 was a Bock that boiled over and the activator never did get super puffy. I know wyeast says that doesn't matter, but it lagged a long time too. It was my second session at my friends and he fermented there. So I am not sure of temps, etc. But it definately had the soapy/wet dog/cardboard thing going on. We tried our darndest to drink it. Added sprite to make it a shandy, still bad. Finally, We wanted the really nice 17oz Steigel Bottles back and dumped.
The other was high school science letting me down. I was using blow off hoses. I also was using the cross your fingers approach of leaving fairly hot wort (90-100) in the cool basement overnight, Then pitching in the morning. So when the wort cooled, it contracted as did the air in the tube which reverse siphoned the sanitizer in. brutal. The yeast still went off, but i poured it out.
The good news is I did a redux of that recipee and it was great. So I'm converting it to aG.