Do you live in chav land?
Showering and going to the shop for grub myself, and also some more painkillers and an antibiotic.
My city is swarming with chavs in certain areas, but I live around 5 miles out of the city. In the 'suberbs' I guess where not many of them roam. These were just little kids having fun.
Chavs are more likely to throw snow calls with rocks/ other hard or sharp objects in them, the moronic tools that they are.