Which cosmic phenomenon has the potential to momentarily exceed the instantaneous energy release of even the most brilliant quasars?
Answer
Gamma-Ray Bursts (GRBs) when beamed directly at an observer
The focused beam of energy from a Gamma-Ray Burst can momentarily dwarf the output of even the brightest quasars, although the quasar's integrated energy release over time is greater.

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Hypernova: The Bigger, Badder Supernova. - YouTube
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