  This Letter presents the novel experimental observation of long and narrow
jets shooting out in disconnecting large elongated bubbles. We investigate this
phenomenon by carrying out experiments with various viscosities, surface
tensions, densities and nozzle radii. We propose a universal scaling law for
the jet velocity, which unexpectedly involves the bubble height to the power
3/2. This anomalous exponent suggests an energy focusing phenomenon. We
demonstrate experimentally that this focusing is purely gravity-driven and
independent of the pinch-off singularity.
