Clue
Mr. Monk Goes to the Library of Congress
Description
Touch ... touch ... touch ... touch ... .... ..... tilt. If you've watched Monk and you look carefully you'll understand.
Why It's Interesting
The posts are perfectly aligned, save for the 5th in line, which is slightly askew. While poor Mr. Monk would be twitching at the slight aberration, it also serves to highlight the perfection and care and pride with which some people did their work.