Not long after I got into the office and sat down at my desk, I began to feel the floor shaking over and over again.  Had I been in California, I would have ducked under my desk or ran for a doorway.

Then it dawned on me that they were driving piles in the Marquette Interchange.  Even after they stopped about 10 minutes later, I continued to feel the rhythmic pounding in my gut for a few minutes after, making me wonder whether it had actually stopped or not.

Now it's back... and is louder... with a definite metallic quality to it.  I think that if I were to go to a window and look outside, I would see a 10 story robotic monster lumbering down the street, crushing cars under it's gigantic feet as it walked.