20 Injured in PR Event for LG Smartphone

LG planned a PR event for its new smartphone at a public park in Seoul. The event featured balloons that each had a coupon for a free phone in them. They planned to release the balloons and then give the phones to people who ended up with them. Some people thought they could game the system if they used BB guns to shoot down the balloons. Surprisingly, this resulted in twenty injuries and several hospitalizations. I'm not sure of how this actually happened, anyone have any ideas?

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