Cantwell was down by about 4000 votes in 2000 and ended up winnning by 2500 a week later !
We have a penchant for come-backs like this in Washington. Christine Gregiore, our current Democrat Governor, was down by 250+/- votes 2 years ago, and won over Republican Dino Rossi after the 2nd (or was it third?) recount by 160+/- votes.
Bundles of votes kept turning up in odd places for several weeks after the election....all with a plurality for Chrissy.