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From tek@evilsuperbrain.com:
The trail behind the bullet looks good but the sound wave looks like a
completely flat plane, rather than the conical wave you describe in the text. I
think the scene would be more impressive with a background and a more realistic
sound wave.

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From zekaric@yahoo.ca:
(To take with a grain of salt, I'm no pro.)

Sound wave?  I must not be seeing what you are meaning.  Adding something else
may have made this a more insteresting picture.
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From soccerplaya91@hotmail.com:

very nice image