It doesn't and cant, any more than Technicals explain the spike...

It doesn't and cant, any more than Technicals explain the spike when there was an offer.
The only explanation I can offer from a fundamental viewpoint is that the stock didn't fall back because once someone has chucked a bid around it often brings out other punters.

Otherwise, perhaps it was Technically undervalued

The reference to voodoo implies erroneous causality. ie you are sick, therefore you are bad etc.