"Neil Hoskins" wrote in message
...
Can somebody explain something to me here? I'm assuming from this one
that it's the guy in the front seat who's doing the driving. But in #8,
the guy in the front seat appears to be doing a double thumbs-up. With
his hands off the stick?

In #8 the instructor was demonstrating how to negotiate the valleys and the
student was showing off.
In #9 [five minutes later] the same aircraft comes back around and now the
student has both hands on the stick with the instructor waving.