You should really keep paying attention to the speed limit while pondering why the heck someone flashes their brights at you even though your headlights can’t possibly be broken because you just had the car checked at the garage the previous day.

It turns out that you remember the other reason why some drivers flash their brights at you in Germany a few seconds later when a blinding red flash indicates that you have just been photographed by the police: The driver was trying to tell you that there’s a speed trap around the corner.

This is what happens if you’re taking the scenic route through the Rhine valley instead of using the autobahn for your way home from work as usual. At least I was only going a little bit over the speed limit; we shall see if I get a ticket or not.

(Related: Why did you flash your brights at me tonight?, Headlight Vocabulary.)