Evolution of the inverted-Y-shaped jet alongwith QSEB-C of Fig. 6 at one of its footpoints. The footpoints of the inverted-Y-shaped structure are marked as Strand 1 and 2. Panel (a) shows the QSEB in the Hβ wing, along with the beginning of Strand 1 of the inverted-Y-shaped jet, which originates very close to the QSEB. Both the QSEB and Strand 1 begin at the same time. Panels (b) and (c) show the progress of QSEB and the strand. Strand 2 starts to develop in panel (c) but is clearly visible in panels (d), (e) and (f). The merged strands with the spire of the inverted-Y-shaped jet are visible in panels (d), (e) and (f). The yellow arrow in panel (a) points to the limb direction. Note that the wavelength positions are different in the panels, to best show the inverted-Y-shaped jet at different instances. The full evolution of the inverted-Y-shaped jet can be viewed in the online movie.