0417 hrs - 2nd platoon Bravo team being overrun by the Viet Cong
the heroes - Charlie Sheen, William Dafoe, and a few others
the movie - Platoon
the sound - rapid fire, going rat-tat-tat...

1043 hrs - the Professor's voice overrun by the typing of students
the heroes - my classmates
the lecture - Web 2.0
the sound - frantic typing to complete an assignment, going rat-tat-tat...