Empty all metal from your pockets and remove your watch. Put these in the courtesy trays before placing your luggage on the conveyor. Or, store these items in the luggage that is being scanned. It may be a distraction that has been staged to facilitate a crime. Instead, focus on your belongings, move to the side of the hallway, and look out for someone rushing toward you.
Thieves use hooks to pull items under walls and over partitions.
They may be part of a criminal team or may just not pay attention. If you have a garage door opener in your car, take it with you while you travel. A thief could break into your car and gain entry to your home. In the hotel, always lock your door with the security latch. A thief could slip into your room and cause you great harm.