Development of the event on September 25. The CME structure is observable in the first three frames of total brightness running differences on top but is not detectable in UV frames in panels (g)–(i). The line-shape features which appear in random directions on (b) and (c) frames are artifacts due to the particle shower on the detector and cannot be eliminated in post-production. The eruptive prominence is visible in the total brightness running differences from 15:49 UT in panels (d)–(f) while the bright UV H I Ly-α bright structure can be seen in the (l)–(n) UV frames at the bottom. The temporal evolution in both channels is available as an online movie (tb_20211025.mp4 and UV_20211025.mp4).