DXM sleep

How does your sleep look after taking upper plateaus at night? For me personally, its kind of weird, because after im starting to comedown, i usually get this weird time forward sensation. Am i just blacking out? I also get some fucked up cevs (not like travelling through some cool ass alien voids but more delirious scenarious). Later i wake up still fucked up with a crazy double vision. Maybe theyre just dreams, but since ive started using it always intrigued me. Does anyone have similiar experiences? Id appreciate the insight☺️