[user104658]

Originally Posted by Cherie

If a pilot knows that they are going to fly into trouble they usually pre warn passengers and the length of time it will go on for, not sure dropping out of the sky can be considered turbulence?

Not to alarm you Cherie but that's what bad turbulence is - it (usually) on the plane feels like a bit of rumbling but the plane can actually be dropping several thousand feet extremely quickly.