Two Naperville men face Class 4 felony charges because of the way they allegedly chose to celebrate the Chicago Blackhawks Stanley Cup victory.

From the Sun-Times:

A Naperville man and his son caught the unexpected attention of police as the men allegedly celebrated the Blackhawks’ Stanley Cup victory by firing rounds from an assault rifle into the ground behind their home.

Mark W. Steinbrecher, 54, and his son Mark S. Steinbrecher, 20, were wearing shirts embossed with Blackhawks and Stanley Cup insignia when their booking photographs were taken at the Naperville police station. Both men face Class 4 felony charges of reckless discharge of a firearm.

Police Cmdr. Dave Hoffman said patrol officers were sent at 12:40 a.m. to the Steinbrechers’ house on Naperville’s far southwest side. A neighbor called 911 to report "a subject in the backyard firing a weapon,” Hoffman said.

I don’t understand.