You might get some estery flavors in there, but don't worry, you didn't kill your yeast. Stressed them out a little at that temp, and maybe you'll pick up a few off flavors, but if you cooled it down timely enough it should be fine. I,ve pitched way too high once or twice in my past and neither beer was ruined. One I didn't taste anything wrong with, the other had some slighty fruity characters from ester production. With the temo cooled down just let it ferment like normal and more than likely you'll be okay.
Oh, just make sure it doesn't get too cool and you end up dropping all your yeast out of suspension.