Writing: when the creative flow is blocked – look out!

Have you ever thought up a perfect put-down, got excited enough about it to rehearse the whole scenario in your mind, then realised you'd never do it?  I'm guessing we all have at some point.  It's human nature to revise situations you were unhappy with and replay them differently, but if you're a writer and you get completely excited about the 'draft scene', you might be on the road to mischief.  In fact, I'd be suggesting you get back to your manuscript asap, because chances are your...