She suddenly started screaming when I crossed the street while the pedestrian light was red. I didn't get what the problem was so I crossed back, to much drama.
She (or her boyfriend) later told me there was a long-running campaign during the 90s aiming to curb pedestrian death, that featured vivid TV spots showing kids die because they routinely saw adults jaywalking and imitated them.
So jaywalking = killing children.
Also German children of all ages are encouraged to say to jaywalkers "You're not a good example for the children.". It happened to me more than once.