A chaotic scene on I-93 in Boston over the weekend after police received several 911 calls about dozens of people recklessly riding ATV's, dirt bikes and motorcycles on the Expressway on Saturday afternoon.

A report from NBC Boston says while attempting to make arrests, one trooper discharged his weapon, striking one of the riders, a 28-year-old Randolph man, in the foot. That man was taken to Boston Medical Center for treatment of a non-life threatening injury. A trooper was taken to Massachusetts General Hospital for treatment of a knee injury.

At least seven people are due in court today facing numerous charges.

Check out the cell phone video below!