The theme parks were packed over the holidays, but the mood wasn’t always so festive.

Law enforcement responded to fights as tensions bubbled up in the crowds in line or after the fireworks. Sometimes theme park employees became the victims after unprovoked visitors hit them or grabbed them, incident reports show. Nobody was seriously injured.

At least two of the complaints involved people who reportedly had mental health issues — including a 31-year-old man who had an episode at Disney World and shoved an Orange County sheriff corporal to the ground before he was held for observation under the state’s Baker Act on New Year’s Eve.

Only one person appears to be arrested and charged with a crime.

Savante Hopkins, 29, of Kingston, Pennsylvania, was arrested Christmas Eve after he ran at a Universal parking employee, threatened him and spit on his cheek at the bus loop, according to an Orlando Police arrest report. He also tried to fight a police officer before he was arrested, the report said.

Hopkins was charged with battery, assault on a law enforcement officer and resisting an officer without violence, all misdemeanors, according to court records.

A Universal spokesman declined to comment.

“The safety of all who work and play at our resort is very important to us,” a Disney spokeswoman said in a statement. “When the occasional disruption occurs, we respond with safety and courtesy in mind and take appropriate action tailored to the individual circumstance.”

Spending holidays at the theme parks can be an anxious time, one expert said.

Already in the holiday season, people cram in activities and feel pressured to do more, said Dr. Alan Keck, a licensed psychologist from Altamonte Springs.

“They tend to feel an increased level of stress which puts tempers on edge and makes people more likely to lose control emotionally and behaviorally,” he said.

And then, the bigger the crowds, the better chance there will be conflicts as people’s personal space disappears, Keck said.

“Standing in a long line or you’re in a crowd of people, it makes people feel a higher level of stress,” Keck said.

In one of the battery complaints at Walt Disney World, a 21-year-old attractions worker cried as she told authorities what happened at Animal Kingdom on New Year’s Eve.

A man who reportedly had autism hit her in the face when his family’s FastPasses didn’t work at an attraction, she said, according to a sheriff’s incident report.

The employee had offered to help the Illinois family find the FastPasses on their phones and asked if they were having a good day when the man unexpectedly hit her, the report said.

That same day at Magic Kingdom, a group held hands to stay together in the crowd after the fireworks when a man tried to pass through them on the Tomorrowland bridge, a sheriff’s report said.

The man elbowed and punched a 21-year-old woman in the chest and shoved a 23-year-old woman to the ground, the two New Jersey women told authorities.

They lost sight of the man in the crowd.

The sheriff’s office also investigated a Dec. 26 spat between two guests in the Dinosaur ride line.

A 34-year-old Texas man who left the queue to buy a pretzel and soda attempted to make his way back into the line again to find his family, the report said.

A 34-year-old Illinois woman in line refused to let him pass and said he pushed her from behind and then called her a “heifer.” He said later she blocked him. She pushed the man — who later identified himself as a police officer — twice in the chest. They both claimed to be battery victims in the report.

The crowds made it difficult for authorities to follow up, find witnesses and make arrests.

“There were nearly 30,000 guests inside of the theme park. I had no way of [finding] the people that were in line near them,” the sheriff’s report said.

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