Generate a question that has the following answer: Pavel for the following movie plot: Jack (George Clooney), a gunsmith and contract killer, and his lover, Ingrid (Irina Bjorklund), are relaxing in Sweden. Jack becomes alarmed by a trail of footprints in the snow and pulls Ingrid towards shelter. Sniper gunshots ring out. Ingrid sees Jack pull a gun from his pocket and shoot the approaching sniper. Knowing his identity is in jeopardy, and with little hesitation, Jack shoots and kills Ingrid. He flees to Rome and contacts his handler Pavel (Johan Leysen), who insists that Jack cannot stay in Rome. Pavel sends him to Castelvecchio (a small town in the mountains of Abruzzo). Jack becomes nervous, and, disposing of the cell phone Pavel gave him, goes to nearby Castel del Monte, Abruzzo, instead. While in Abruzzo, Jack contacts Pavel, who sets him up with another job. He meets Mathilde (Thekla Reuten), who wants him to build a custom sniper rifle for an assassination. He also begins patronizing a prostitute, Clara (Violante Placido), and they begin a relationship separate from her business duties. Jack meets with Mathilde to test the weapon. She is impressed by the craftsmanship, but asks him to make a few more adjustments. Later, Jack realizes that he is being followed by an assassin from Sweden, whom he kills. Jack is tormented by dreams of the events in Sweden and regrets killing Ingrid. His friendship and conversations with a local priest, Father Benedetto (Paolo Bonacelli), encourage him to question his life choices. Both Mathilde and Clara notice Jack's association with butterflies, Mathilde by his expertise in endangered butterflies and Clara by his prominent tattoo. When Father Benedetto tells Jack he senses he lives in a special kind of hell, "a place without love," Jack starts to let himself feel love for Clara, and envisions a life with her. Jack talks to Pavel one last timeasking how the Swedes have found him. In his growing fear, he even suspects Clara when he discovers a small pistol in her purse. He questions Clara about the gun and is satisfied with her explanation (to defend...
A:
Who does Jack he hear behind him as he goes to meet Clara?