Its when there’s a freeze frame and then there’s a zoom done on the film print itself, usually revealing some of the film grain. Some times its done as a kludge, like they wanted to do a zoom while shooting but forgot. But sometimes it seems to be done deliberately for dramatic emphasis.
They were popular in the late 60s/early 70s. Beck’s Devil’s Haircut video uses it a lot (I think to add to the video’s 70s look). But is there an official name for this? Like what would a director tell an editor, “Let’s put a blank here”.