Three SDO/AIA images of the active region. In all panels the region of enhanced emission, associated with the ejection of the EUV wave-train, is highlighted by a blue box. The red points F1 and F2 indicate the start and end points of a guiding funnel structure. Panel a) shows the 171 Å image. Panel b) also shows a 171 image, with the previous frame subtracted. The red arrow indicates an enhancement propagating along the funnel. Panel c) shows a 131 Å image, the orange arrow indicates the direction of a propagating outflow. The time evolution is shown in the movie available online.