Just a couple of points.
Entering and leaving the jetstream can cause a bunch o turbulence, being right on the edge too.
IF you watch your OAT (or SAT or whatever) and you see a change in temp, it may be a warning of turbulence.
IF you ever want to see a hoot of a picture, see the film, "THE PILOT" with Cliff Robertson. It is pretty darn good. (if you like a bit of reality). There is one scene in which everyone is looking at the inside of the rudder trim cover plate on a DC8 and laughing.
SOME OF YOU MIGHT KNOW what they were looking at.
Its hard to find, but you might just learn something!