The driver put the life vest on and snapped its strap around his waist. Sokolov, inspecting him like a squad leader checking a trooper’s parachute, tugged at the strap and gave it a yank to make it tighter. He then held up his fist, thumb and pinky akimbo, to his jaw. The driver, understanding this universal gesture, reached into his pocket and produced his phone, which Sokolov confiscated.