CNN -- A trip from Louisiana to California took a bizarre turn -- during a connection in Houston.
A man says he fell asleep on a plane filled with passengers, but when he woke up -- he was all alone, locked inside.
"That's not good that you could just be stuck on a plane," said Tom Wagner, who was trapped onboard a United express jet at the nation's fifth biggest airport.
"I woke up and the lights were out. I was like 'what's going on'," he said.
Wagner was frantic. He said the last he remembered-- he took-off his hat after boarding the flight in Lafayette - and dozed-off in his window seat near the back of the airplane.
"Everybody falls asleep on the plane," he said.
Once in Houston-- no one bothered to wake Wagner up, not a passenger, not flight attendant or pilot-- no one. So, Wagner slept.
"They didn't sweep the plane. I mean who shut the door?" he said.
He said he woke up to a cold - pitch black cabin, and thought he was dreaming when he made a frantic call to his girlfriend.
She thought he was joking.
About a half hour later-- workers boarded the aircraft-- and were stunned to find the lone passenger.
"I said, 'don't put the blame on me. I didn't do anything wrong here.' And then they were like try to, hush-hush keep it quiet," said Wagner.
Expressjet issued this statement to KTRK in Houston: "Expressjet is investigating to determine how this occurred. We sincerely apologize for the inconvenience this caused for the passenger."
"Let this be a lesson. It was incident enough. It was a faux paux," said James Conway is a former FBI agent and counter-terrorism expert.
He says the incident is alarming.
"If an individual is going to be missed, what about a package of a backpack or piece of luggage that could pose a threat to the aircraft on the next flight," he said.
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