My poor little sake yeast got added to a beer with over 100 gravity points. I thought, hey, the alcohol tolerance is super high, surely it can handle this? To its credit, it didn't get stuck for almost 100 points of eating. Come to think of it, it might not have even been the gravity. There was a buttload of table sugar in the brew. Either way, those suckers did their best. Even after I made a starter of Premier Cuvee to rescue the batch, it's still taking months to dry.
Right now I have some coffee stout sitting on a Weihenstephaner cake. Tastes great so far, but we'll see what the finished beer looks like. The explosive fermentation of Weihenstephaner yeast helped stir the coffee beans, I guess.