A Ryanair flight departing Thessaloniki, Greece, reportedly turned dangerous soon after takeoff when a window came loose or failed, pulling a passenger’s head and shoulders outside the aircraft. Aviation specialists say the frightening effect is tied to the pressure difference between the cabin and the air outside the plane as it climbs.

Even at about 16,000 feet, that imbalance can create a powerful rush of air through any opening. If a window is damaged, cracked or dislodged, the force can draw nearby objects — or even part of a person’s body — toward the gap. Experts say that helps explain how a passenger sitting close to the failed window could be pulled outward so suddenly.

The incident has also renewed attention on how airplane windows are built and why failures are rare but serious. A problem may begin with damage or weakening in part of the window assembly, and once the structure is compromised during climb, the pressure load can make the situation worse quickly.

For travelers, the advice remains basic but important: keep your seat belt fastened while seated, pay attention to safety instructions, and follow crew directions immediately during any emergency. Aviation experts say those simple steps can reduce injuries when an unexpected in-flight problem occurs.