recipe substitutions

So you've got to make this dish to take to this thing, you've got no time and kids who need your attention and halfway into the recipe which calls for an egg, you suddenly realize you're out with no hope of getting to the store for more...what do you do? Either throw in the towel...or substitute for the egg:
2 1/2 tablespoons of powdered egg substitute plus 2 1/2 tablespoons water OR 1/4 cup liquid egg substitute OR 1/4 cup silken tofu pureed OR 3 tablespoons mayonnaise OR half a banana mashed with 1/2 teaspoon baking powder OR 1 tablespoon powdered flax seed soaked in 3 tablespoons water.
Betcha didn't know you could do that!
Allrecipes has a great table of common substitutions - check it out.