Edit:
I have been told this is not a review audit
audits (the thing you mentioned here) are probably not applicable in this situation. First off, looking at the linked review it doesn't say it is a "Review Audit" (see here). Secondly, Japanese doesn't have review audits enabled, since it's not big enough to warrant them. (@bobble)
Therefore, please disregard this information below.
There is another possibility
We throw a few known cases into the queue* as "gotchas" to keep people from just nailing "Looks Good" or "Close" or whatever without reading the questions.
If you see one of these just handle it normally, we're probably going to make them a little more... subtle over time. For now we're pulling from really obvious sources: spam, and uncontested high quality posts.
Hmm... back then that trick wasn't in place on sites outside of SO, not sure about now.
@Martin This is currently only enabled on SO, it will eventually be on everywhere. – Kevin Montrose♦ Aug 18 '12 at 17:53