The 2nd/3rd edition Orc war wyvern. Not only did it have two huge halves of metal for the body which were so drastically different it was like they were from two completetly different miniatures, but it also had the wings.
*Shudder* The wings *shudder*
Pin em, glue em, and fill in the 2 foot of space between the wing and the socket with putty, prime it and paint it. Then breathe whilst in the same room to watch the wings drop off for the 9000th time. I lost a good few months of my life to those bloody wings.