Flows and brightenings measured along an artificial slit in HRI_EUV. Upper panel: artificial slit (red line) used to measure the intensity over time along a medium-sized active loop to the south. Lower panel: intensity vs. time plot showing various types of activity along the loop. Brightenings that propagate along the loop are seen at 08:38 and 09:44 UT. Furthermore, a localised, non-propagating brightening is present at 09:56 UT.