This is actually extremely common. My heavy use of psychedelic has made weed better, more clear-headed/introspective (though not nearly to the same degree as real psychedelics), moderate visuals, a little more energetic (except when I smoke all day). I also get mild visuals from large amounts of caffeine and when I'm just waking up in the morning- waking up in the middle of the night sometimes it almost actually feels like I'm tripping too (though not quite & not for very long at all). Visual static/grainy vision was an effect of marijuana for me right from the beginning, well before I took any psychedelics, and my sister who's never done a psychedelic says the same thing- marijuana still is a hallucinogen after all, though not nearly as deep/mystical as psychedelics or dissociatives.