Panel a: set of emergent synthetic Stokes profiles in the MURaM sunspot simulation at the location of a supersonic downflow in the tail of a CEF-carrying filament. The spectra were synthesized using the SPINOR code (STOPRO routines). Panel b: degraded Stokes profiles obtained from the convolution of the synthetic spectra with a PSF of 0.16 arcsec, similar to the case of the Hinode telescope.