  The shorter-than-Schwarzschild 3C 279 variability flare on June 2015 is very
puzzling. Its nature cannot be due to any NS merging nor to a medium sized
(hundred million solar mass) BH collapse. Our preliminary model is based on the
long-life (a third of a year) merging of a medium size BH (hundred of solar
mass) jet spiralling toward the largest AGN one, (billion solar mass), that is
dragging by tidal torques the medium small size BH jet along the main AGN 3C
279 one. The tidal torque is aligning both jets toward Earth. The twin
overlapping blazars may offer at once a long and a short scale variability
consistent with the surprising Fermi discovers.
