Shouldn't that be a big red button, so as not to be confused with the other buttons or switches normally used in routine flight operations?
Looked like they had 50 SWAT cops out on the tarmac, and the passengers thought they were all going to die.

http://www.foxnews.com/travel/2018/06/2 ... rport.html

A JetBlue flight reportedly became unresponsive to tower communications while taxiing for departure at John F. Kennedy International Airport in New York City Tuesday evening, triggering a security scare.

Flight 1623 was scheduled to depart for Los Angeles at 7:30 p.m. ET, but stopped responding to air traffic control before takeoff.

The pilot had entered a hijack alert by mistake, which sent Port Authority Police Emergency Services unit aboard the plane, sources told The New York Daily News.

She said some people feared they were experiencing a terrorist attack before takeoff.

“People were, like, crying. Everyone’s texting their family, and we were on ground, so usually this would happen in the air if it was gonna happen,” Curtis said. “People were ready to die.”