I fly... A LOT.
And when you fly enough you start to notice patterns.
Have you ever noticed that there are always 3 dings right before take off. That means... SIT DOWN, it's go time.
Also, two dings, then a flash of the seat belt sign... well that means "put those drink carts away... It's about to get bumpy."
More on the secret languages used on an airplane: ***CLICK HERE*** ***CLICK HERE***