Well, it seems like if you smoke more, those so-called "hallucinations" will pretty much fade. Marijuana is classified as a "hallucinogen"... so it's entirely possible that you could see some fucked up things out of the corners of your eyes. I would just suggest smoking a bit more, and see if you still see things.

But, some other hallucinogens, (LSD, Mushrooms) can set off schizophrenia and other mental disorders. And you don't want that.