Maybe this isn't the right forum, but I don't see an "Art Theory" stack exchange.
In the movie Lucy, just opened this weekend, near the beginning the bad guys are closing in on the main character and the director heightens the effect and links it to all of evolutionary history on earth by inserting scenes of big cats stalking and taking down their prey in the wild.
Is that an example of "expressionism"? From wikipedia:
Expressionist artists sought to express meaning or emotional experience rather than physical reality.
which sounds right to me, but I'm not an art theory guy. If not, what would you call that, inserting shots that explicate the action but are outside the narrative and explicitly depart from realism?