[gootdude]

"... Two clerks were in the store, not just one. Lima-Marin and Clifton brought them both into a back room, forcing one onto the floor and the other to open the safe. “They put a gun to the back of my head and said, ‘This is where you’re going to die,’” one of the employees, Shane Ashurst, later recalled."

https://www.themarshallproject.org/2015/04/07/unfreed

A bit more than simply asking them to move to another room.

[basseq]

The "mov[ing] from one part of a store to another" was how the article characterized the kidnapping charge. I would imagine that forcing someone to the floor and threatening them with a gun would be part of the aggravated assault charge. Otherwise, what's the difference?