As his actor son Abhishek's superhit film Guru clocked 14 years on Tuesday, Amitabh Bachchan termed the movie as 'fantastic' and his son's performance as marvelous. Bachchan's remarks came after a fan page on Twitter by the name of 'Thugs of Amitabh Bachchan' shared a video clip featuring stills from the movie and heaped praise on the father-son duo and the film.