Fans at Friday night's fireworks show during the Rocket City Trash Pandas' game in Madison, Alabama, saw the pyrotechnics launch directly into the crowd.
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Video obtained by Eyewitness News that was posted to social media shows dozens of fans running for cover.
A security guard was reportedly struck in the foot and had to go to the hospital but is expected to be OK.
The team said the fireworks that veered off course were roman candles that were installed upside down by mistake.
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Officials said they're taking them out entirely for future shows.
No injuries were reported.