I can't really say you'd hallucinate too much on weed. If you want to hallucinate, you'd be looking more into the harder psychoactives to the likes of LSD and shrooms.

I've never tried anything more than cannabis and alcohol, not even tobacco. My mates whom had a session with shrooms all experienced visual and auditory hallucinations for apparently ages; they said they remember watching like the clock melt, the roof sliding down and the weirdest of all is they all repored seeing weird godly looking entities when they would close their eyes and they felt heaps weird when they thought of them and are amazed at how clear the images were in their head at the time.

You CAN hallucinate mildly on weed... I for one HAVE experienced some visuals. The most prominent one was when I saw a black fuzzy ball slide across my mates pool table, that wasn't there.

Other than that, when I smoke up outside in the patio at night I always after maybe 2 or 3 bongs see colors pulse everywhere and get some sort of visual distortions like comic and trails - that's the best you'd probably have in terms of visual hallucinations; more less distortions.

In terms of auditory, they are possible. If you're high enough, you can sometimes think you can hear music, the TV or people communing with one another... Like you'd stop and think 'Huh, I swear I heard the TV...", then you'd stop and listen for it and you'll hear it even more clearly... Pretty weird.

If you so badly want to attain a hallucinogenic high, i'd suggest having a week or so off smoking and then purchasing some nice bud, and smoking up out of a bong or have a waterfall at night time - the visual distortions are easier to see in the dark.

Smoking fast doesn't really seem to do anything but burn you out... Especially with waterfalls and bongs... Pipes and vapes are a bit different from personal experience, just take in bigger hits.

Don't expect too much, but like I said; shrooms or LSD if you really want to hallucinate.