Overplot of HeII 4686 Å, Hβ, and Hα lines from individual spectra obtained on 2010 February 2 and 6 (rebinned to the same, coarser wavelength scale of the later date). It is quite obvious how the large radial velocity change displayed by HeII between the two dates does not have a counterpart in the Balmer lines, neither the broad pedestal nor the narrower core.