Planet13 - 7:59 pm on Jul 3, 2013 (gmt 0)
"Hmm...you haven't stated the period for which it ranked. Was it ranking for long and dropped recently?"
It started ranking on third page around Feb 2011, moving up to second page a few months later, and then being in the number 9 - number 8 organic spot on page 1.
It's peak in terms of entrances was around April 14, 2012.
But by May 6, 2012, it had been decimated; it was getting only about 1/10th the entrances that it was previously getting.
Somewhere around 12th of April, 2012, the HOME PAGE started ranking for the term "blue widgets", and the blue-widgets.html page STOPPED ranking for that term. In essence, the number 8 position (where my blue-widgets.html page used to rank) in the serps was replaced by my homepage.
Then sometime around November 30th, 2012, EVERYTHING stopped ranking for the keyword "blue widgets".
"If their ranking was only for a few days/months, it could even be other reasons like google promoting the page to see whether users like them,attracts more links, etc. If it were not doing well against the benchmarks, they might have moved it to where it need to be."
In short, the blue-widgets.html page was ranking for nearly a year for the term "blue widgets", moving up from 3rd page to page 1.
Then the index page replaced it for about 8 month (although it slipped gradually from page 1 to page 2)
Then it was gone. Poof!
(unfortunately I am using google analytics which obscured the search term because I can't find my old keyword ranking reports from a third party rank tracker.)