An error or post mint damage?

I found this in a nickel roll and I'm not quite sure what to make of it. Suggestions?

 

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Rim dings can be caused in many ways, all after the minting process has ended, but damage is not collectible, and never adds a premium to the coin's value.

Something hard struck the coin, undoubtedly with more force than just dropping in the chute of a coin machine.

 

Yea, that coin is worth exactly five cents.

 

Definitely post mint damage.