Loki's Little Machine

I work with Loki at a Little Shop at our Local Mall. When she gets bored, or sick of dealing with people she has a little machine that she can turn on that creates a paradox. The paradox likewise creates a hole into another dimension. This other dimension has a higher gravity than ours and pulls customers in, never to be seen again. It's actually really cool, but sometimes she forgets to turn it off when she leaves.
The other night I was closing with our manager an no one came in the store all evening. We would see people walk by, but none of them would stick. They'd just disappear before they reached our other door. And then we figured out that Loki had left her paradox machine on. I need to figure out how to turn it off, if there's some sort of qualifier or something we can throw in there to break up the paradox.