Quote Originally Posted by JohnnyZ
That's the important part of tripping.. you need to remember none of it is real. Only then can you venture further into the recesses of your mind.
That's tricky though. Depends on how vivid your hallucinations are. Blurry, fuzzy ones like Faddenator talked about are pretty easy. Sometimes hallucinations can seem as substantial as reality though. Then the line between which is which gets a bit more unclear.

I've never had hallucinations from smoking weed myself, however, people who were smoking the same weed as me have made that claim. I have experienced distortions such as perceiving movement as jerky like a screwed up movie or seeing things as extra colorful and vibrant. Never anything like what I experienced on hallucinogens such as LSD.