My normal exit is marked with the Red x, and my office is marked by the blue x. Normally, I walk out of the station and have a nice little jaunt up 18th street to my office. Notice, however, that today, this route was located smack in the middle of what i like to call the "Danger Zone." So I exited the station where the black line starts. I tried to walk west on I street, but unfortunately there were a few policemen blowing whistles very loudly and telling us we could not walk on that block. They are indicated (not to scale) by the policeman clipart. So i then had to reverse course back out to 17th street, walk north for a block up to K street (if you're curious why it skips from I street to K street, Maggie has the answer here), then walk west on K to the office. In the end, it only lengthened my commute by about 8 minutes, so no harm done. But now I can add 'suspicious package' to the list of things to happen to me on the Metro.
Update (Tuesday): It was an empty can.