Experiments frequently come with surprises. In a driven Bose-Einstein condensate, we observe unexpectedly generation of many matter-wave jets leaving the condensate with quantized momenta as a result of bosonic stimulation. Based on a pattern recognition scheme, we identify a universal pattern of correlations which offers essential clues to unveiling the underlying microscopic processes.

Finally, connection of the matterwave jets to the dijet structure in heave ion collider will be discussed.