Each house member is permitted a total of 5 minutes for questioning. It’s a parliamentary procedure thing. At one point the chair admonished members “you can give a speech or question the witness but you can’t do both”. Reclaiming one’s time takes away the ability of the witness to answer the question that was asked so the speaker can can continue to speak. It essentially makes the question rhetorical. The portion I watched was a “$#*+ Show”.
The whole d**n thing was a complete waste of Bill Barr’s day, except he got a few good zingers in on the idiot democRats who were interrogating him. And we got to see the democRats make complete fools of themselves. It was disgusting.