Natural disaster. Invasion. Apocalypse. You need to be evacuated immediately and you have about five smurfing seconds to grab one thing and one thing only from your house to bring with you. We'll assume that family members and pets, etc are taken care of and you're headed to some place to find shelter and food. One possession of yours you get to pick to bring with you and nothing else. What do you snag?

I think I'd have to grab my photo album out of my nightstand drawer to take with me. That or my "special memorabilia" box with every little special thing I've tried to save in my life.