Quenching is a recently discovered phenomenon in which QCD jets created in heavy ion collisions deposit large fraction or even all their energy into produced matter. We suggest that if that matter is strongly coupled Quark-Gluon Plasma (sQGP), which is believed to possess very small viscosity and be liquid-like, this energy should propagate outward as a ``conical flow'' similar to well known sonic booms from supersonic planes. We solve linearized relativistic hydrodynamic equations to detail the flow picture. We argue that for RHIC collisions the direction of this flow should be at $\Delta\phi=\pi\pm 1.1$ rad, which happens to match perfectly the position of the maximum in angular distribution of secondaries associated with quenched jets.