A passenger boarded a Boeing 777, then opened a door and fell out of the plane

• An Air Canada passenger boarded a Boeing 777 then opened a cabin door, per Global News.
• The person fell onto the tarmac below and emergency services were called.
• The incident delayed the departure of the flight to Dubai by about six hours.

An Air Canada passenger opened the door of an aircraft and fell about 20 feet to the ground, Global News reported.

The incident involved a Boeing 777 at Toronto Pearson International Airport, an airline representative told the outlet.

The passenger "boarded the aircraft normally" but then opened a cabin door instead of going to their seat, they said.

The person sustained injuries from the fall, and emergency services were called, per Global News.

According to data from Flightradar24, Monday's flight from Toronto to Dubai took off almost six hours late. It had 319 passengers on board, per the outlet.

Air Canada did not immediately respond to a request for comment from Business Insider, sent outside normal working hours.

An airline representative told Global News: "We can confirm all of our approved boarding and cabin operating procedures were followed."

Air Canada is investigating the incident.

It's the second time in less than a week that a passenger's unusual behavior has delayed one of the airline's flights.

Last Wednesday, an Air Canada flight was diverted after a 16-year-old assaulted a family member.

Police said other passengers and crew on the flight from Toronto to Calgary restrained the youth, who was arrested and taken to hospital.

After being on the ground in Winnipeg for about two hours, the flight landed in Calgary about three hours late.