Could a coin jingling in your pocket grade MS-65?

Interesting story in the latest Coin World about a Mule cent-dime. Story goes a woman dropped her purse, and a "dime" rolled out, and she noted the odd color. Long story, short, it's a mule, graded MS-65RED by PCGS. How likely is it a "regular" coin that's been in circulation comes back MS anything? Another example of a rare coin's special grading scale?
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Russ, NCNE
Paul
Jeez, all I have to do is look at my coins the wrong way and PCGS knocks the grade below 65
I submitted to PCGS a statehood quarter I got in in change and it came back MS-67
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since 8/1/6
I get my lunch and another handful of change. Looking through that, I find a '52 Nickel, also in great shape, but nothing worth grading. Judging from today, I'd say it's possible that a "regular" coin could be found in MS condition, but it might only be in circulation every 10 years or so and then lay dormant once again.
-Chris