I really like that term 'momentary autism, ' a woman says softly into the mike. She is in the back of the Times Square Studios speaking to a room of some 200 people, and more important, Malcolm Gladwell, who's standing solo onstage. It's the second day of the fifth annual New Yorker Festival, and Gladwell has just finished a detailed reprise of the seven seconds that LED to the infamous 1999 fatal shooting of Amadou Diallo. Minutes before, every eye in the room was locked on him as he unspooled the nanodecisions that misled four New York cops into thinking the innocent Guinean immigrant was an armed criminal, resulting in 41 shots,19 to the chest.