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The only supernovae (SNe) to have shown early gamma-ray or X-ray emissionthus far are overenergetic, broad-lined Type Ic SNe (Hypernovae - HNe).Recently, SN 2008D shows several novel features: (i) weak XRF, (ii) an early,narrow optical peak, (iii) disappearance of the broad lines typical of SNIcHNe, (iv) development of He lines as in SNeIb. Detailed analysis shows that SN2008D was not a normal SN: its explosion energy (KE ~ 6*10^{51} erg) andejected mass (~7 Msun) are intermediate between normal SNeIbc and HNe. Wederive that SN 2008D was originally a ~30Msun star. When it collapsed a blackhole formed and a weak, mildly relativistic jet was produced, which caused theXRF. SN 2008D is probably among the weakest explosions that producerelativistic jets. Inner engine activity appears to be present whenever massivestars collapse to black holes.

The metamorphosis of Supernova SN2008D/XRF080109: a link between Supernovae and GRBs/Hypernovae