Wasn't it "That Devil Forrest" who pulled the old routine of bringing the same fieldpiece over a hill, running it around the side to the back again, and then bringing it over the top again? I seem to remember one time that a Confederate commander did that while he was engaged in surrender talks with a Union officer, who asked him after seeing artillery in a seemingly endless stream coming over the hill, "How many fieldpieces have been able to keep up with you?" to which the reply from the Confederate was, "Well, I've counted 16 so far", all of which were the same fieldpiece. If memory serves me it was indeed Forrest. Another similar incident happened shortly after McClellan's landing on the peninsula. The main confederate force hadn't arrived yet and the force that was there consisted of about 12,000 men under John B. Magruder. McClellan didn't know that though and Magruder kept marching the same men back and forth, convincing the yankees that a 100,000 man army stood in between them and Richmond. As a result McClellan hesitated and the main confederate army had time to arrive.
Another classic was the Quaker Guns used by resourceful Southerners.