Cambridge Police report charging Mark Lidsky, 20, of Woburn, with armed assault with intent to rob for the Friday-morning incident.

According to police, "Lidsky approached the victim as he was walking on the sidewalk and put a gun under his chin while demanding his belongings," at Norfolk and Washington streets.

His victim, Improv Asylum actor Dan Faneuf, however, fought back, grabbing his attacker's arm and forcing him to the ground before police arrived.

Innocent, etc.