Ok, while I was walking from Seer's Village to Catherby, I walked past camelot. I looked and a saw a little gray object floating in the air. I walked over to it and i right clicked on it. I was able to "Operate Pump". My charecter started to push and pull a lever in the air. Quickly, a few people ran over and started laughing. After about 10 mins we decided it was the pump for the Blast Furnace. I reported the bug to RuneScape and made a post on the forums. Soon enough a crowd came and joined in. A Player Mod came and classafied the bug as harmless and left. After 30 more mins we had quite a large crowd. Then 30 mins later, after people took turns and pumped away, it just dissapeared. Some people say a person was pumping and dissapeared with it ut this has yet to be confirmed. Here is a pic:
