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\begin{abstract}  In January and August of 2014, two unusual transient events were observed in a strongly lensed galaxy at z=1.0054$\pm$0.0002.   Discovered by the FrontierSN team in Hubble Space Telescope (HST) observations from the Hubble Frontier Fields (HFF) program, these events are designated HFF14Spo-SE and HFF14Spo-NW, and collectively nicknamed ``Spock''. Both transient episodes were faster and fainter than any normal supernova: they rose to a peak absolute optical/ultraviolet luminosity of $M\sim-14$ mag ($10^{40}$ ergs/sec) in only $\sim$3 rest-frame days, and then faded away below detectability in roughly the same amount of time. These events appeared in two adjacent arcs of a strongly lensed galaxy that is multiply-imaged into at least 3 distinct images by the gravitational potential of the galaxy cluster MACSJ0416 (z=0.396). Using four independent lens models of this cluster, we find it is entirely plausible that the NW and SE events are {\it spatially} coincident on the source plane, but very unlikely that they were also {\it temporally} coincident. We evaluate several physical models for these events, and find that the least disfavored explanation is that we have observed two distinct outbursts from a single extraordinary recurrent nova. This model would imply that the HFF14Spo system has the fastest known recurrence timescale of any nova ($\sim$8 months). Further, if our estimate for the gravitational lensing magnification is correct, then HFF14Spo is about 2 orders of magnitude more luminous than an average nova. This model would therefore require that the HFF14Spo system's primary star is a white dwarf very close to the Chandrasekhar mass limit, and that it is drawing mass from the secondary at an extremely efficient rate (??? $>10{-8}$ $>10^{-8}$  \Msun/yr ???). This in turn suggests that this system is a strong candidate to eventually explode as a Type Ia Supernova. \end{abstract}