I made this sculpture for a college class, I think it came out pretty well! I started out with a small clay model, which I scaled up into a steel rod armature. Then I cut and welded strips of steel to flesh out the shark. A quick steel box, some recycled plastic tubing from the garbage, and a couple of cabinet knobs later we have our finished piece! The teeth are made from saw blades, and the whole sculpture sits on a bent piece of rebar (it was supposed to look like a smoke trail, but the effect doesn't come across quite as well as I would have liked).