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laser light has this way of enhancing interference patterns as it spreads out, this is why it has weird looking patterns when projected in a wide angle.
This is also probably what the person in this post was seeing and tripping on, staring directly into a laser pointer while high as balls.
It appears to be on some sort of apparatus that can make it draw a line, I wouldn’t be surprised if there’s some gimmick that makes it actually draw cryptic letters or something too
