lysergiocacid:

At low doses hallucinogenic interruption is felt as entoptic hallucination, but at higher doses modulatory interruption leads to more extreme frame destabilization. Subjects under the influence of tryptamine hallucinogens report sensory frame lag and slow-motion frames; frame delay or echo; frame flange or recursive looping; frame stacking or frame freezing; frame rewind and fast forward; dropped frames; split or bifurcating frames; frame skipping; and similar non-linear frame effects. These are all examples of extreme erratic hallucination linked to multisensory frame destabilization.

- Psychedelic Information Theory

(via improper-deactivated20120117)