Man wearing gas mask panics passengers on Texas flight

GRAPEVINE, Texas -- A man wearing a gas mask was escorted off a commercial flight Thursday after causing a panic, according to a passenger on board.

"Just FYI flight 2212 to Houston was delayed an hour because you let this guy on the plane wearing a gas mask," Joseph D S wrote on Twitter. "This then panicked people on the plane and we had to wait for him to be escorted off."