"Arabs Attack Jewish Drivers with Rocks Packed in Snowballs," Jewish Press December 12, 2013 (thanks to Mark)
The snow in Jerusalem Thursday no [sic] only did not stop Arabs from attacking Jewish motorists with rocks but also helped them to do sin [sic] by disguising the rocks as snowballs.
Pelting drivers with snowballs is a dangerous hobby all over the world because if they are like ice, the projectiles can easily break a window or simply cause the driver to panic and cause an accident.
That is the objective of Arabs who throw rocks at Jewish drivers every day, but two Haredim were suppressed [sic] Thursday when “snowballs” crashed through their window in the Beit Hanina neighborhood in Jerusalem.
As the snowballs melted away, the rocks were exposed.
No one was injured in the ambush, but their car sustained damage.