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From agage@mines.edu:
Nice image.

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From lowellr@globaldialog.com:
Considering I have used this "Signature technique of yours" on some of my
pictures
I have as much right as you to request you not to use the technique - None.

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From gmccarter@hotmail.com:
Good detail.  Interesting way to suggest movement.

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From cfusner@enter.net:
Simple, yet well executed. I personally would have put the equations on
a piece of paper, book, or chalk slate nearby, rather than floating 
letters, but that's just an opinion. One noteworthy point that didn't
make it into your TXT file was the bit of phong in the air "trailing"
the moving sphere. Not quite motion blur, yet very effective at helping
to imply motion.

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From alex@astro.queensu.ca:
little black dots connecting the string and ball look unusual.

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From bsieker@techfak.uni-bielefeld.de:
Very elegantly composed image.