Got some examples from my brother and scanned them. To the naked eye, both coins in the first photo have a blob in the bottom of the S in PLURIBUS, but in the scan only the right one shows.
Photos
Blob very noticeable for the right coin on the right:

Blob at 9600 BPI then compressed:

Blob at 1200 BPI on a second coin w/o compression needed:

Considering that it comes from both the top and bottom, it looks a lot like a mouth.
Photos
Blob very noticeable for the right coin on the right:

Blob at 9600 BPI then compressed:

Blob at 1200 BPI on a second coin w/o compression needed:

Considering that it comes from both the top and bottom, it looks a lot like a mouth.























