I've taken over 300 hits of acid in my life and done shrooms somewhere around 40 times, as well as two 2c-i trips and some DMT experiences. I had a suspicion for awhile that all those past LSD experiences had mutated my weed high. Especially after my strongest LSD trip which lasted close to 3 days. I had plenty of time to figure out the persistant effects of the drug, the breathing, subtle motions and ever-re-adjusting depth perception that just seems to stick from beginning to bitter end. And for good while after that trip I would swear everytime I smoked weed it would toss me right back into that scenario. It was very daunting at first and I felt as if I was now perpetuating a process of provoking flashbacks. I had to teach myself to be comfortable with it, to think "welp, i didn't get high to feel normal...." and "who cares whats happening as long as it doesn't bother you". However, it did subside overtime and as far as I can tell smoking weed is the same as it was before I started my hallucinogen adventures.
On the other hand, I have had a few instances that just didn't make any sense. The "that had to of been laced" instances. I've had some really visually weird ass highs in my time. One example is this time I was being smoked out by this girl, and I took one hit off the bong, a good hit but nothing that made me cough more than once or twice, and suddenly the ceiling seemed so far away and the ground seemed so close and when I got up to walk to the bathroom I was having a difficult time walking right because the floor kept shifting into different inclines. I had to hike up a hill to get to the bathroom haha it was ridiculous.