  Strongly interacting electrons can move in a neatly coordinated way,
reminiscent of the movement of viscous fluids. Here we show that in viscous
flows interactions facilitate transport, allowing conductance to exceed the
fundamental Landauer's ballistic limit $G_{\rm ball}$. The effect is
particularly striking for the flow through a viscous point contact, a
constriction exhibiting the quantum-mechanical ballistic transport at $T=0$ but
governed by electron hydrodynamics at elevated temperatures. We develop a
theory of the ballistic-to-viscous crossover using an approach based on
quasi-hydrodynamic variables. Conductance is found to obey an additive relation
$G=G_{\rm ball}+G_{\rm vis}$, where the viscous contribution $G_{\rm vis}$
dominates over $G_{\rm ball}$ in the hydrodynamic limit. We argue that
superballistic, low-dissipation transport is a generic feature of viscous
electronics.
