haha man, I know what you mean. Two times i have taken ~900 mg DXM ( I usually take around 400 mg and im about 135 lb)
When it kicked in, I could not walk or do anything but lay there and close my eyes. My hearing was majorly enhanced to the point where I was listening to all the conversations going on outside my room down the hall and I was basicly watching tv in my mind.
Also when taking about 550 mg, I would stand in my room with my eyes closed ( they get realy sensetive to light) and I was walking around my house basicly being able to see everything in my mind with my eyes closed.
Dxm has shown me amazing things but I have been doing it way too much so Im taking a month off and possibly stopping all drug use all together as I have been having suicidal thoughts for three years now and I thing my drug use makes my depression worse.