Speaking of wicked mistakes, I always thought it was a wicked mistake that the whole 'Wicked' thing became such a sensation.
I'd read the book when it first came out, and believe me, never dreamt that it'd one day be turned into a musical! 
*wicked mistake:
I'm from the east coast, and we use the word 'wicked' a lot.
Wicked cool, wicked nice, etc.
Muddling through...