A "momentary distraction" refers to a brief interruption or diversion that takes your attention away from what you were focused on, but only for a short period of time. Full definition
The concept not only satirizes a capitalist executive's superficial quest for momentary distraction and meditation, but also suggests the tension between willful intention and an uncontrollable outcome. (artpace.org)
«In everyday interactions with significant others, people often assume that momentary distractions by their cell phones are not a big deal,» another researcher involved in the study, Meredith David, said. (inc.com)
As such, they only serve as momentary distractions for what director Cuaron (Harry Potter and the Prisoner of Azkaban, Great Expectations) really wants to shoot, i.e. some spicy sex and emotional angst. (qwipster.net)