Drago Pettrovich Madnar decoy

A decoy posing as Dr. Drago Pettrovich Madnar was active in Outer Heaven during the 1995 uprising. Anticipating Madnar's rescue by FOXHOUND agent Solid Snake, the decoy awaited his arrival in the basement of Building 2, while Madnar himself was transferred to the second floor. When Snake attempted to free him, the decoy revealed the ruse and activated a pit trap beneath him, falling to his apparent death, and hoping to take Snake with him. He failed, however, and Snake managed to evade the trap.

Behind the scenes
The Madnar double appears in the original Metal Gear though his exact nature is never revealed.