Left: xy-positions of corks with logT = [4.99, 5.01] at t = 5000 s, color-coded with vertical cork velocity. Red indicates downflows; blue shows upflows. Right: C iv (1548 Å) Doppler shift map for t = 5000 s. Blue indicates blueshifts (upflows), red shows redshifts (downflows). The color bar on the right shows the velocity scales; the same range has been chosen for both panels.