I only ever heard of weed causing hallucinations - or rather psychotic episodes - in people who allready were having psychotic episodes. You don't even get hallucinations with LSD, even *that* is a movie trope.
The world is full of misinformation and derp. expecting otherwise is to invite failure. I enjoy a good burn every so often, and the closest I have come to a hallucination is that of hearing something. And that's a situation of being stoned literally all day smoking non stop. I have never heard of "face melting" experiences being an effect of THC.