Dropped suspected pipes+mdma a few years ago. Very dirty little fuckers. Come up was intense very MDxx like but as soon as the plateau hit it was obvious there is something wrong. Music was extremely good and I felt very euphoric but it was a very cold feeling. It's hard to explain, perhaps euphoria combined with anxiety would describe it. Other symptoms were impaired vision(could only see ~20m), very uncoordinated, stiff legs, being totally fucked up and hallucinations. The hallucinations were very specific, for example only faces would morph to some shit(aliens, old men and such) and every time I tried to read my cell phone the text would turn into hieroglyphs. There was something going on with my eyes too because it was impossible to focus on something that was too close, the items would multiply and rotate, I suspect it was because my eyes were rolling/bouncing. Funny thing was that people kept disappearing and a few times the whole dance floor and the dj disappeared leaving only the flashing lights and a mixer without the dj. Also I tried to chew my face off, I have never seen anyone chew gum as fast and hard as I did that night, never. Curiously I was able to sleep +9h after dropping the first pill, felt pretty fucking exhausted. The pills I took tested blue on marquis. Don't know if it was pipes or what but I'd put my money on pipes.