I really wanted to like this movie; the trailers had me hooked, even though I know that the "90% of your brain" cliché is completely false and annoying. (It's like how we very thoroughly know by now that radiation doesn't give you superpowers, but I still like the Incredible Hulk; the origin story for his powers is nonsense, but I can just ignore that and enjoy him, the same way I can enjoy the X-Men, where superpowers just randomly exist and don't require an origin story.) Sadly, however, "Lucy" is an absolutely terrible film, with only a couple of interesting moments. I believe it was this movie which cemented my current opinion of Scarlett Johannsen, since thoroughly reinforced by her role in the various Marvel movies, that she is an audience-avatar performer who doesn't even try to actually act, basically the female equivalent of Keanu Reeves in "The Matrix" - not truly a character, but just a vehicle for the viewer to imagine themselves as, with no personality traits that might conflict with the viewer's own and thereby ruin this immersion (as an aside, this is largely irrelevant of the viewer's actual gender; I'm as manly a man as you'll find outside the Navy Seals, but I have no problem enjoying a movie with ScarJo as its lead, assuming that movie is actualy good, unlike this one). With a well-established character like Black Widow, such an approach works perfectly well; here, it fails utterly, because the movie around her doesn't give her anything worth doing.