From the only reliable source of Catholic news on the net, Eye of the Tiber:
In a 80-minute briefing to the media, a lighthearted Pope Francis began to speak “very candidly,” when the head of the Pope’s security team, reportedly realizing the havoc the off-the-cuff remark might have on the rest of the U.S. trip, discreetly glanced at another member of the security team and nodded. That’s when, one witness reported, the Holy Father was struck in the neck with the dart and “went down like a ton of bricks.”
“Pope Francis had just seconds earlier mentioned the words ‘do not judge;’ that’s when it happened,” said a reporter on the papal flight. “He immediately stopped talking, felt the dart in his neck, and just dropped.”
Another witness reported seeing a number of officials quickly whisking the Pope’s limp body away to private section of the plane. The dart was removed shortly thereafter, and the groggy Pontiff awoke and found himself shackled to a post away from the media for the remainder of the trip.When PopeWatch attempted to contact the Pope for comment, he was advised that His Holiness was taking a nap for the next 36 hours.