Wiktionary
flash frame
n. In video or film editing, a flash frame is a very short shot (usually one frame, but occasionally several) that appears in a sequence of images. Flash Frames are usually inadvertent and result from either an editing mistake or an equipment problem. From time to time, however, they are inserted intentionally for creative reasons.
Usage examples of "flash frame".
Even as the pledge is made, memories of another death flash frame by frame through the memory: violence, movement, blood, white noise roaring in the ears, a deafening internal scream that can't be heard.
Cliff had compared the job with that of trying to figure out the entire plot of a long stereostory from just one flash frame.