trying to understand what happened

So at the new year's i was at this rave, i took a pill, it was around 400mg, i also did ketamine before, while and after rolling, crazy thing, out of my mind really cool, what im trying to understand is, after taking the second half of the pill, i also did a line of ketamine and i started having crazy visuals, i was fucking trippin rolling dancing and i still cannot understand if it was the kitty flip itself or, as my friend said( he knows the dude i got the pill from better than me) if the pill was mdma + 2cb, it was bicolor, i mean i was tripping so good but so strong man, i started having visuals with my eyes closed that after a while started remaining even at open eyes, i was seeing colored drawings, smileys and other things, at one point i look at the dollar bill i used to snort ketamine, and from green it got pink and i could see the drawings on it moving and mutating, after i realize that everything around me gets more defined and vivid, almost like a cartoon, at one point i have this crazy visual, a bloody red brain that connected me and all the others who was doing mdma in that moment with a red line, after that i start getting periferic visual hallucinations, patterns on the floor on people's jackets and i start seeing people faces mutating(it was a little scary seeing people faces in vertical), i got out of the place, look at the sky and see the falling burnt lanterns that was falling down from the night before floating, but i tought they were helicopters and wow shit was so cool but im trying to understand what it was, so if yall can maybe figure it out, it'd really help me.