"With a bag in his hand, he stood still in front of a shop window, pretending to be a display mannequin. When he felt safe, he went hunting and robbed the island of jewellery," the police said in a statement. Poland Shocker: Man Poses As Mannequin To Execute 'Well-Planned' Heist at Jewellery Store in Warsaw Mall, Runs Out of Luck After Alert Security Staff Spots Him; Arrested.