METUCHEN, NJ—Thirty seconds after descending the stairs, Ken Bley, 41, announced he had no clue what he went downstairs for. "I don't think it was to get something," Bley said. "I think it might have been to check on something." Bley said that if he cannot recall his purpose in the next minute, he will return to the bedroom and try to reconstruct the train of thought that led to the mysterious task. "I'm thinking it had something to do with the kitchen," Bley said. "I have this picture of the pantry junk-drawer in my mind."