This flare on GUVV J004347.7-445130.7, observed once in GALEX eclipse 7500, is the highest-energy flare known to have been observed by GALEX. The top left image is the GALEX NUV full-frame image, with the subframe indicated appear in the top right. The images below it are the corresponding FUV full-frame and subframe images. The solid circles in the subframe images indicate the 17.″5 aperture; the dashed lines correspond to 25″ and 35″ radii apertures, used for background calculations. The first plot (red line) is the NUV lightcurve with 30 s bins; the axis on the left is in flux units and the minimum and maximum AB mag values are indicated on the right. The second plot (blue line) is the FUV lightcurve with 30 s bins. The bottom plot (black line) is the FUV/NUV flux ratio (unitless).