The other, humans are barely even allowed awareness of, let alone affect..

this is the Natural Mirror World ____________________________________________________

Oscillate OS'CILLATE, verb intransitive [Latin oscillo, from ant. cillo, Gr. to move.]

To swing; to move backward and forward; to vibrate

Octave OC'TAVE, noun [Latin octavus, eighth.]

In music, an eighth, or an interval of seven degrees or twelve semitones. The octave is the most perfect of the chords, consisting of six full tones and two semitones major

So, what may be happening here is not the particles going to another world, but shifting into an higher octave of this one ____________________________________________________

As far as the "Dark People" from the dark world...

Watch "Thor: The Dark World"