On the road - there and back again through Germany

Driving in the German highways is never dull.
For example: you can drive for kilometers without a speed limit, then all of a sudden the speed limit becomes 100, 200 meters later it's 80. And you see all the cars in the left lane breaking at the same time, all getting very close to each other, until you think for sure there's going to be an accident. Then, all of a sudden, the speed limit disappears again - and you are left wondering why in the world the speed limit was there for, until you realize that it was because there was a curve on the highway, or because there was a slight descend. It makes perfect sense - NOT!

Then you are presented with little "pearls" like the ones bellow:
 

^^ These people really l-o-v-e to pull big trailers, or whatever that thing is, with their cars. ^^

^^It's even better when it's caravans, which already drive very slowly, doing it.^^

^^Then there's the old car pulling there older car.^^

^^And the couple who decided that the best way to spend time together was to ride on the highway side by side while trying to have a conversation. Again, it makes perfect sense!^^

It's nerve racking and, without question, the worst part of the entire trip. Only the landscape saves the day and makes it a little better.