Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of medical examination specialist ExamWorks (NYSE: EXAM) plummeted 30% Wednesday after its quarterly results and full-year guidance disappointed Wall Street. 

So what: ExamWorks' second-quarter top and bottom lines ($72 million and $106.7 million, respectively) were pretty much in line with analyst estimates, but it's obvious that some big shareholders wanted a lot more. In fact, the shares are flirting with the lowest point they've seen since the company's late-October IPO.

Now what: I'd cautiously look into this plunge as a possible buying opportunity. Management's full-year revenue outlook of between $405 million and $415 million was also in line with Wall Street estimates, making today's nasty sell-off all the more baffling -- and potentially profitable. If ExamWorks is truly, in Chairman Richard Perlman's words, "ideally positioned to sustain this high-growth rate," today's buyers should be nicely positioned as well.

Interested in more info on ExamWorks? Add it to your watchlist.

Fool contributor Brian Pacampara owns no position in any of the companies mentioned. Try any of our Foolish newsletter services free for 30 days.

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