The Dubai Airlines flight

This flight ended with an emergency landing, the pilot injured with stab wounds and the passengers traumatized after a 17000 foot drop in 1 minute. It must have been terrifying. The cause is unknown, but apparently there was a fight, perhaps between pilots in the cockpit. Apparently a reserve crew on Board helped land the plane.

Details will undoubtedly follow.

I have flown in windy conditions which creates turbulance.
The plane stops gliding and drops.
Some passengers start laughing. Others brace themselves, and others just go into panic and lose control. I always instinctavely brace myself with arms against the seat or side. It is scarey