The left wing is always a dangerous place for a Trump supporter to be. Even on an airplane.

But when Scott Koteskey boarded his flight from Baltimore to Seattle on Saturday, he likely had no idea the woman sitting next to him would berate him in an incoherent and unhinged rant – that was all captured on a video that quickly went viral.

“You pretend you have the moral high ground but you put that man’s finger on the nuclear button,” the unidentified woman said after a flight attendant left to get security.

“That man doesn’t believe in climate change,” she said, referring to President Trump, and using air quotes to frame the word “believe.” “Do you believe in gravity? Did you know gravity is just a theory?”

Eventually, an airline staffer told the woman she would have to be removed from the plane.

“No. I paid for this seat and I’m sitting in it,” she said. “He is in my space.”

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The woman, seated next to her husband, continued refusing requests to leave.

“I’m going home now. My mother-in-law, his mother, died…I’m going home now,” she said. “There’s no way I’m getting off this plane…My husband lost his mother. Have some respect.”

But her sob story wasn’t getting anywhere with the staffer.

“I’m terribly sorry for that, but that does not give you the right to treat people the way you’ve been treating them,” he said.

A second video showed people on the airplane cheering and chanting “U.S.A.!” as police escorted the woman off the plane.

A video taken from a different angle shows the woman giving the passengers the middle finger as she's removed.

Koteskey, in a Facebook post, said the woman was even more discourteous to him before the cameras began rolling. He said the entire incident was touched off when she asked if Koteskey was “here to cheer or protest.” Koteskey replied he was merely in town to “celebrate democracy.”

"And I'm entitled to get drunk and puke in your lap!” the woman allegedly said. “I'm going to throw up right in your lap! You make me sick! Don't talk to me! Don't look at me! Don't you dare even put your arm on that rest. You disgust me! You should be ashamed of yourself! You put a maniac's finger on the button" (assuming she means nukes). You are a bigot. You should get off this plane!”

Koteskey said, however, the reactions of his fellow passengers were heartening.

“As the lady was removed I saw that I was surrounded by blacks, Latinos, Asians, and whites, all who had chimed in asking her to be removed and who had defended me,” he wrote on Facebook. “I was touched and moved knowing later that not all these people were Trump supporters. The black man who took the seat next to me was a registered Democrat and he and I had a very good discussion about the beauty of free speech and coming together when people insult and commit acts of violence just for having differing views.

"It truly was a great demonstration of AMERICA and its people coming together and standing up for one another."

This wasn't the first time a Trump supporter was harassed before a flight. In December, a passenger had to be removed after he allegedly began loudly yelling at Ivanka Trump and her young children.