question:  Why has Infield attached a lightning rod to his head?
context: Henry Infield placed the insulated circlet on his head gently. The gleaming rod extended above his head about a foot, the wires from it leading down into his collar, along his spine and finally out his pants leg to a short metallic strap that dragged on the floor. The gyro actually passed over a man's shoulder, through his legs, under his arms. If anybody does see that button in a patient's ear, it looks like a hearing aid. With that image over everything he sees and with that insidious voice drumming in his head night and day, do you mean to say that man's senses will only be impaired 23 per cent? Infield stepped into the main stream of human traffic and tried to adjust to the second change in the air. A young man with black glasses and a radar headset (a photophobe) was unable to keep from being pushed against Infield. It was the first time in years that anyone had apologized to Infield for anything. A clean-cut young man with mouse-colored hair was moving toward the stubble-chinned, heavy-shouldered man quivering in the center of a web of impervium cables stuck secure to the walls and windows of buildings facing the street, the sidewalk, a mailbox, the lamp post and Infield. Mouse-hair yelled hoarsely, "Uncouple it, Davies! The magnetic suction dart dropped away from Infield like a thing that had been alive and now was killed. After breathing deeply for a few moments, he looked up to see Davies releasing and drawing all his darts into his belt, making it resemble a Hydra-sized spiked dog collar. Mouse-hair drove a fast, hard right into the soft blue flesh of Davies' chin. Infield's pulse raced, trying to get ahead of his thoughts, and losing out. Infield shifted around, trying to see that side of his benefactor, but couldn't manage it in good grace. This was revealed, as he turned his head, to be a small metal cube above his left ear.
output:  He believes it has cured him of his fear
options:  He needs it in order to survive the elements  He wants to go back to being an Incomplete  He is conducting an experiment involving electricity  He believes it has cured him of his fear