Kinematics of the events. Relative positions of the trailing features of the UV bright structures, frame by frame, expressed as polar angle variation (top panel) and in distance on the PoS in solar radii (central panel) with time. The reference values for the polar angle and time are listed in Table 3. The residual of the position r estimated from the PoS velocity fit, v, is shown in the lower panel, providing the acceleration trend of the structures, whose values are also displayed in Table 1.