CT baggage inspection is (fairly) new and only used in some places like carry-on screening. This was probably a behind-the-scenes belt x-ray planar image where the giant chunk of metal blocked everything underneath, so they kicked the bag out for a quick look somewhere along the line.
It’s not too unsurprising to see bags routinely get re-xrayed in the belt system when they come off of flights back stage.
It’s not too unsurprising to see bags routinely get re-xrayed in the belt system when they come off of flights back stage.