Two; two is NOT several.
"...Seven passengers interviewed by the Orlando Sentinel -- seated in both the front and rear of the main passenger cabin -- said Alpizar was silent as he ran past them on his way to the exit. One thought he had taken the wrong flight. Another thought he was going to throw up..."
"..."I can tell you, he never said a thing in that airplane. He never called out he had a bomb," said Orlando architect Jorge A. Borrelli, who helped comfort Alpizar's wife after the gunfire. "He never said a word from the point he passed me at Row 9. . . . He did not say a word to anybody."
"...Two teens seated in Row 26 agreed. So did Jorge Figueroa, a power-plant operator from Lakeland seated a few rows behind first class.
"...He wasn't saying anything; he was just running," Figueroa said. "I said to myself, 'It is probably a person who took the wrong plane.' "
...
"...What Alpizar's fellow passengers did hear were the desperate explanations from Buechner, Alpizar's wife, who at first seemed embarrassed by her husband's hasty exit. She started to follow him off the plane, saying, "He's sick. He needs to get off the plane," witnesses said."
"...But she had forgotten her bag and turned back to retrieve it. That's when passengers heard yelling from the jetway.