Thought I'd share a few links:
Guernse6's Screenwriting Page - Story Structure (I found this to be the best resource so far.)
Diana's Diversions - In Which The Author Contemplates Structure
Kung Fu Monkey - Writing: Plot and Story
There are so many tensions involved in any creative activity so when there is a catastrophe you never indicate that you think the end of the world has come. You examine it and say, "Well, this is a fine new catastrophe. Now, what else is important today?"