Alice in Wonderland Syndrome. The syndrome is characterized as:
A visual disorder in which objects appear much smaller than they actually are, possibly caused by a retinal disorder but often associated with hallucination or an unconscious attempt to shrink the world to a less threatening size.
The animals, humans, or parts of humans may also appear closer or farther away than reality. Popular over the counter cough medicine, and drug of abuse Dextromethorpham can cause this unusual state of conciousness. The syndrome is also named Lilliputian Syndrome after small people in Gullivers Travels.
Robotripping is the street name for the high produced by abuse of the cough syrup Robitussin which contains dextromethorphan.
