Complaining about a flight on Twitter has become common practice for frequent travellers, but for one American man a tweet did more than get a response from the airline on social media.
He was asked to leave the plane - before eventually being allowed to re-board.
Duff Watson, from Minneapolis, USA, had priority status to board Southwest Airlines flight 2347 from Denver to Minneapolis.
At the gate, his two children were not allowed to join him in boarding early.
He tweeted about it: "Something to the effect of, 'Wow, rudest agent in Denver. Kimberly S, gate C39, not happy @SWA,'" he told the local CBS station.
Then, after all three had reached their seats, Watson says the agent asked him and his family to de-board.
Watson said the agent told him she felt threatened and that he had to delete the tweet.
"She said, 'You can't board the plane unless you delete that tweet,'" he said. He deleted the tweet, and the family made it to Minneapolis.
Southwest confirmed to Mashable that a customer was removed from the flight.
"A Southwest Airlines employee and customer were having a conversation about the airline's family boarding procedures that escalated," an airline spokesperson said.
"The customer was removed from flight #2347 from DEN to MSP for a period of time to resolve the conversation outside of the aircraft and away from the other passengers."
"She said 'I'm going to call the cops,'" Watson's daughter Lucy recalled. "I, like, thought something bad was going to happen, like my dad being in jail."
Watson said the airline apologised by email, and offered a US$50 (NZ$58) voucher for all three family members, but he still plans never to fly Southwest again.
"The customer and his family later continued on the same flight to Minneapolis," the airline spokesperson said.
"We are thoroughly researching the event and, if necessary, will counsel those employees involved. For the customer's inconvenience we offered vouchers as a gesture of goodwill."