Air Canada is reviewing a passenger's claim that she was left sleeping on a plane for hours after a flight landed, leaving her to find a way to escape a cold, dark and empty plane.

Tiffani Adams was returning home to Toronto from Quebec and said she fell asleep "probably less than halfway" through the one-and-a-half hour flight, before waking up "around midnight (few hours after flight landed) freezing cold, still strapped in my seat in complete darkness (I’m talking pitch black)."

The lengthy post shared to the Air Canada Facebook page was posted by Deanna Noel-Dale, whom Adams had been visiting.

She continued: "as someone with an anxiety disorder as is I can tell you how terrifying this was... I haven't gotten much sleep since the reoccurring night terrors and waking up anxious and afraid I'm alone locked up someplace dark."

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Adams said she tried to FaceTime her friend, but her phone died soon after, and attempts to charge the phone through USB ports proved fruitless. Eventually, she wrote, she was able to find a flashlight in the cockpit and unlock the main cabin door, through which she was able to flag down an airport worker, who set up a ladder to help her down from the "40-50"-foot drop.

Representatives for the airline brought her into the Toronto Pearson International Airport and offered a car and a hotel but Adams declined: "All I want to (do is) go home," she recalled thinking.

Air Canada spokesman Peter Fitzpatrick told USA TODAY that the airline has "followed up with the customer and remain in contact with her," and is still reviewing the incident.

Adams said she had spoken to representatives for the airline, who apologized for the inconvenience and told her they're investigating how this happened despite protocol that should have prevented it.

"When my seat is an inch back or my tray is down flight crew take notice but yet you missed a person still strapped into her seat and just all go on home?!?!" she wondered.