Helena Bonham Carter and Aaron Eckhart play a former couple who meet at a Manhattan wedding and wind up having a one-night stand in her hotel room. Gabrielle Zevin’s script borders on the pedestrian, but it’s made to seem unorthodox because of director Hans Canosa’s split-screen technique, which usually features adjacent or overlapping simultaneous views of the two characters and occasionally flashbacks or subjective imaginings alongside the present action. Oddly theatrical, this method seems a poor cousin of staging in the theater, which offers the audience a wider range of things to observe; despite the resourcefulness of the two leads, the movie finally registers as much ado about very little. R, 84 min.