A flight instructor jumped to his death out of a small aircraft over Argentina, forcing the student pilot he was teaching to land the plane herself.

Leandro Andrés Bertazzo, 42, was on board a two-seat Cessna 150G on Saturday when he made the decision to jump out over the province of Córdoba, according to CNN, which cited its Argentinian affiliate TN.

“He made this tragic decision on board an aircraft with another person by his side,” Eduardo Álvarez, director of the Flying Parrot Córdoba flying school where Bertazzo worked, told TN. “It’s impossible to think about it or understand it, but the human mind is so complex.”

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Rosario, the 22-year-old student, later told authorities that Bertazzo told her, “You know what you have to do, carry on,” before taking off his gear, opening the door and leaping out, according to Álvarez.

Opening the door of a plane midair is incredibly difficult. Álvarez said it would be akin to trying to open the door of a car traveling 124 miles per hour.

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Álvarez said that Rosario managed to land the plane safely, despite being in “complete shock.” There was no damage to the plane, according to TN.

Álvarez noted that Bertazzo had gone on a flight with another student earlier in the day.

Álvarez also told TN that Bertazzo had visited a psychiatric institute, something that was only known by his family prior to his death.

Prosecutors in Córdoba will lead the investigation into Bertazzo’s death. The plane he jumped from is now in police custody.