Straka was rebooked on a later flight after he agreed to comply with company policies, the airline said, and American is reaching out to him for more information on the incident. Straka said he wore a mask the company provided but took it off once he was on board the plane and no one complained.

“This is insane. Absolutely insane,” Straka said in a Periscope post on social media. “We don’t even have a choice anymore.”

Straka told CNN in a phone interview that the flight was close to departing when “one of the flight attendants came to me pretty aggressively and said, ‘Sir, you need to be wearing your mask.’ And I said, ‘Well, I don’t have one.'”