2006 D Nevada state quarter error on horse's rear end?

It looks like it might be doubling, shaped like an S or something. Any ideas? It is definitely raised and not indented.
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It looks like it might be doubling, shaped like an S or something. Any ideas? It is definitely raised and not indented.
Comments
Could it be a dent from a reeded edge of another quarter or is it raised?
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It looks both raised and indented.... Metal has been moved by a strong hit.... PMD. Cheers, RickO
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In honor of the memory of Cpl. Michael E. Thompson