Actually I am not interested in that epigenetics happens, I am interested in how a mouse that fears cherry blossoms and or electricity changes it's somatic cells. See the changes have been documented, but there is no explanation for how the changes are passed from the mind and or nervous system to alter the next generation without random mutation.
However you can grace us all with the answer?
The precise pathways are not clear, but when a severe stress response is associated with some environmental event, stress hormones (e.g. adrenaline, cortisol) are released and activate various physiological responses (e.g. fight or flight, freeze in place). These responses include sensitisation to the triggering stimulus - this occurs in the brain by reinforcing the connection between the sensory processing area related to that stimulus and the amygdala which mediates responses to survival threats.
It appears that either the sensory processing area or the amygdala also cause an epigenetic change (presumably hormonal) that affects regulation of development of the sensory receptors involved and the associated sensory processing areas in the brain, so that more receptors are produced and more brain resources are available to process their output.
By changing the regulation of the DNA responsible for development of that specific receptor pathway, an epigenetic change can have a broader scope than just reinforcing the fight/flight association, and may also be transferred to the next generation (although most epigenetic changes don't get passed down).
It's true that we don't understand the whole set of interactions involved, but then we've only just discovered that epigenetic effect itself. Research takes time, epigenetics is a field in its infancy.
The fact is that we do not understand how DNA works, so we could be years, millenniums or eons from this understanding
We understand the basic mechanisms, we don't yet understand all the ways they are used.
But the fact that we don't know or understand everything doesn't imply that there's anything supernatural about any of it - it just means there's still a lot to discover and understand.