Not a re-enactment so much, but I've seen a show on Military Channel/Discovery/History Channel where they shot from a similar angle at dummies filled with gelatin specifically designed to mimic the insides of the human body, and the bullet did change course pretty dramatically, much like light refracting through water. (Edit, this may be the same show Blindzebra is talking about.)
On another note, Patsy Paschall was filming and observing from the old courthouse and saw smoke from behind the GK:
http://www.jfk-info.com/paschall.htm
This film is on youtube, but it's so dark that it's worthless. Must be the inferior bootleg copies mentioned on the page above.