Front of the NW CME on October 28, 2021, observable in the Metis pB base difference in the first two panels on 15:49 UT and 16:19 UT. In the simultaneous (f) and (g) UV frames, only a slight change in the intensity of the corona is visible. The ellipsoid-like feature of the event is bright in blue-colored (h), (i), and (l) frames in the Metis UV channel at the bottom. The CME assumes a fuzzy shape in the pB base differences in panels (c), (d), and (e) at the top. The VL base frame is at 15:19 UT. Noisy bright points appear after 18:19 UT because of the particle shower on the detector. The temporal evolution in both channels is available as an online movie (pb_20211028.mp4 and UV_20211028.mp4).