https://finance.yahoo.com/news/really-happened-apples-face-id-fail-onstage-181213050.html

“Unlocking it is as easy as looking at it and swiping up,” he said, picking up the phone at his podium. “And—you know—“

The audience knew right away that something was wrong. Not because the phone didn’t unlock automatically and instantly, as it should have, but because Federighi seemed rattled.