IRIS 1400 Å (panels (a)–(h)) images show mass flows originating from a nodular feature on the spine of the fishbone-like structure. The flows move in nearly opposite directions, approximately perpendicular to the spine. The red and blue arrows trace the mass flows moving northward and southward, respectively. Composite AIA 171 Å (red), 193 Å (green), and 131 Å (blue) (panels (i)–(l)) images show the coronal brightening processes accompanying the mass flows. White arrows denote the brightenings. Iso-Gauss contours of ±100 G are superposed by white and blue curves in panels (a) and (e). An animation of panels (a)–(d) and panels (e)–(h) is available. In the movie, events 1 and 2 correspond to panels (a)–(d) and (e)–(h), respectively. The animation has a 1 s cadence.

(An animation of this figure is available in the online article.)

(An animation of this figure is available.)

The video/animation of this figure is available in the online journal.