This is your Captain screaming.

 Good grief.  From This is Your Captain Screaming.  

I whipped round and saw the front windscreen had disappeared and Tim, the pilot, was going out through it. He had been sucked out of his seatbelt and all I could see were his legs. I jumped over the control column and grabbed him round his waist to avoid him going out completely. His shirt had been pulled off his back and his body was bent upwards, doubled over round the top of the aircraft. His legs were jammed forward, disconnecting the autopilot, and the flight door was resting on the controls, sending the plane hurtling down at nearly 650kmh through some of the most congested skies in the world.

Everything was being sucked out of the aircraft: even an oxygen bottle that had been bolted down went flying and nearly knocked my head off. I was holding on for grim death but I could feel myself being sucked out, too. John rushed in behind me and saw me disappearing, so he grabbed my trouser belt to stop me slipping further, then wrapped the captain's shoulder strap around me. Luckily, Alistair, the co-pilot, was still wearing his safety harness from take-off, otherwise he would have gone, too.

Read the whole thing.  From a BA flight in 1990.