An illustration of the operation of a jointer for woodworking.  Based on Media:Jointer.gif originally by SilentC.

Made using Inkscape.  Wood grain technique using calligraphy pen as described at http://ryanler.wordpress.com/2007/05/31/inkscape-create-a-woodgrain-effect/, originally by chrisdesign.
Own work
Struthious Bandersnatch