“I Am Vengeance” (** out of four) was a lumpy revenge potboiler about an ex-Special Forces soldier turned professional mercenary (Stu Bennett) who learns of the death of his best friend (Kevin Leslie) and his family and vows revenge, no matter how deadly the consequences. Moves in fits and starts and never garners significant momentum but is held together and made watchable by Bennett who seems to have studied and absorbed the charisma of fellow Brit action stars Jason Statham and Vinnie Jones