Your first few attempts at MIG-welding will most likely not yield a very effective or good-looking weld. This is Mike's first attempt, and it's not too pretty. You'll find that a steady hand is one of the most important parts of making a good weld. In this photo, we see that although the welder is set correctly and the weld is penetrating the metal (look at the heat marks around the weld area), the weld is not good. Without much practice of the proper technique, Mike moved too slow and didn't spread the curlicues far enough apart, so the weld piled on top of itself.