Everyone knows that nowadays especially, mentioning anything at all unpleasant or scary on planes is grounds for removal from a flight- but what appears to be a psychiatric incident involving one flight attendant gave some passengers out of Dallas Ft. Worth a scare earlier this week.

In fact, it is widely said that you shouldn’t panic on a plane unless the crew looks worried, so the passengers on American Airlines flight 2332 probably got really freaked out when a flight attendant engaged in some scary and unbalanced behavior for a brief time. The unnamed stewardess got on the plane’s intercom, said the flight was going to crash, and referenced the September 11th attacks. Several unsettled passengers spoke to press after the incident, and one said:

“She was just screaming- blood-curdling screams… I will never get that sound of her screaming out of my head.”

Passenger Brad LeClear says that several passengers restrained the woman following her outburst, and described the aftermath:

“‘She told me she was bipolar,’ said Brad LeClear, one of the passengers who helped restrain the woman, according to ABC News. ‘Toward the end of this whole struggle, she said, ‘I am going to kill them all,’ he added.”

Following the incident, American Airlines confirmed its occurrence in a tweet, saying:

“We’re investigating an incident on flt 2332. Customers weren’t in danger at any time and are on their way.”

The flight returned to the gate at Dallas Ft. Worth, and took off again an hour after following a crew change. The flight attendant and another unnamed woman were hospitalized following the incident.