At one point during a high-speed chase down the Mass Pike yesterday, a 29-year-old Framingham man barreled through three state police cruisers.


Before arresting alleged suspect Alejandro Serra, a trooper can be seen on a WBZ-TV videotape throwing several punches at a grounded Serra.


“A suspect who rammed three police cruisers and almost struck an adult man and his grandson in a crosswalk, we don’t lose sight of that,” state police spokes-man David Procopio said.


After the grandfather complained about loud music in Serra’s car, Serra allegedly tried to run them over.