"A UFO event in which a human is abducted by a UFO or its occupants. This type was not included in Hynek's original close encounters scale.
Hynek's erstwhile associate Jacques Vallee argued in the Journal of Scientific Exploration that a CE4 should be described as "cases when witnesses experienced a transformation of their sense of reality", so as to also include non-abduction cases where absurd, hallucinatory or dreamlike events are associated with UFO encounters"
I think that it's the best kind of Aliens Abduction ^.^'