I was stopped by a cop in Berlin for jaywalking. He didn't give me a ticket. But there were no cars around either.

There is also an unspoken rule for jaywalking, don't do it around kids. I also saw 3 tween girls walking across the street on a green, they were right around half way when the crosswalk light turned red. They all turned around and went back. It was kind of funny. My American friend told me a funny story where he was drinking with German friends, and they walk back at like 3am with no cars in sight and he of course crosses the street and all the Germans were back at other side waiting for it to turn green.