IRIS SJ images in the 2832 and 1400 Å bands and spectra of Si iv 1393.8 Å, C ii doublet (centered at the 1334.6 Å line), Mg ii k, 1351.7 Å Cl i and the O i 1355.6 Å–C i 1355.8 Å lines during the main event. Missing SJ images, due to their lower cadence, are replaced by the previous ones. The arrow points to a weak emission from the Mg ii triplet line. The wavelength is expressed in terms of the line-of-sight velocity, with the origin at the line center. The images and the spectra in each column are displayed with the same intensity scale. For a more complete sequence see the movie attached to Fig. A.3.