article_snippet.sent: Scroll down for video .
article_snippet.sent: It just felt like a re-enactment' While federal safety officials had no explanation for what happened on the aircraft on Wednesday, aviation experts said the flight crew did the right thing by quickly descending to an altitude with life-giving oxygen levels.
article_snippet.sent: It was something very gradual.'
article_snippet.sent: It just felt like a re-enactment.'