The opening sequence establishes mystery and suspense. It begins with a close-up of a shaking hand holding an unknown object, then pans to reveal a silhouette of a man high atop a building, gripping another man's tie as he hangs over the edge holding a whimpering dog. The man questions who he is, setting up an enigma. After building tension, it cuts to reveal the same man 15 years ago, now dopey and pathetic, providing juxtaposition. This gripping opening leaves viewers wanting more from the thriller.