In a word, don’t.  Seattle is a very small legal community, and you can be sure that how you handle things in the workplace, specifically when you are separating from your firm, will follow you.  If at all humanly possible, give the appropriate amount of notice.  There are some very specific circumstances where this wouldn’t apply, but they are extremely rare.  Leaving a firm with no notice, usually associated with some sort of argument or disagreement that you feel cannot be fixed, or hasn’t been dealt with in a way that you would have found acceptable, is never a good idea.  It is always best to give notice, act professionally for every hour you remain in the office until that period is completed and never – ever – speak negatively about a former employer in an interview.