HAGERSTOWN, Md. (WJZ) — Brawls break out at a Maryland mall over shoes. And it’s not the first time shoppers have gone too far for Nikes.

Kai Jackson explains what’s driving the chaos.

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The store had more anxious customers than they had sneakers for sale—and that was a recipe for trouble.

Valley Mall in Hagerstown is peaceful now, but a sneaker, Nike’s new Foam tennis shoe, caused near-riot conditions inside the mall on Saturday, like a melee at another mall in December after Nike released a popular pair of Air Jordans.

“Just a fight going on down there at Foot Locker. Arguments; someone said that there was knives pulled,” said mall employee Cassandra Jenkins.

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About a dozen officers responded and moved all customers outside. They say the problem was a classic dilemma: supply and demand. There were 150 customers, but only 90 pairs of shoes for sale. They sold out in minutes.

“What we did is we brought in five customers at a time, let them get their shoes and just kept rotating like that,” said Sheriff Doug Mullendore.

According to reports, the Nike Foam sneakers sell for more than $200 at places like Foot Locker, but they’re so popular they can double in price, selling for as much as $500 on the Internet.

“They only release them once a year and when they’re on sale like that, some people buy them for themselves. Others buy ’em to resell and…they can double or triple their money,” Mullendore said.

“Yeah, I could believe that something would happen like that. I mean, it’s just terrible,” said mall employee Porsche Russ.

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The retro Air Jordans sold for about $180 a pair.