When a captain turns on the "fasten seat belt" sign, saying we might be going to hit some turbulence, but then leaves it on for hour after hour after hour (with exactly no
actual turbulence experienced), is this because
- he's forgotten to turn it off
- being young and fit he has no concept that not every passenger has unlimited bladder capacity
- we really are flying through a weather system thousands of miles long which might eventually produce some actual turbulence
- we're flying over an iffy part of the world and he thinks he might have to dodge missiles
?