Gene Moreau dot com

WestJet flight’s sharp drop injures 9

“Passengers say the pilot warned about the turbulence on the intercom, but many didn’t have time to secure their seatbelts when, seconds later, the plane dropped straight down.”

I believe this is why they warn you on every flight you have your seat belt fastened at all times while in your seat.  Even if the “fasten seat belt” sign is not lit.