I just got back from my 10 day meditation retreat. I signed up for the vippasana ones but got declined the past two years because I'm under 18. I got my mom to let me stay at her cabin for the retreat although I had to text my parents daily. I sat 6 hours a day. 4 hours vippasana 2 hours kriya yoga. I did this because I was sleeping a lot, cooking my own meals, and I wanted time to just sit informally. No fap no distractions so it was a legit retreat. It was a sick location, saw lots of wildlife. The first few days were super hard emotionally but that passed and the rest were brutal too. Halfway through the first day I was just planning when I would leave early. At the end of the second day I was doing kriya yoga and my body was pulsing with energy, at the top of the breath on kriya pranayama. I left my body and just felt a singularity of energy, and saw spinning red fractals. This happened again about half a dozen times.  On the 6th day this happened and I think I entered some kind of state of cessation or some altered state. I came back to my body falling to the floor in a state of sheer confusion. It took me a while to figure out who I was or what I was doing. I think this was a result of the cessation of the narrative of the ego because I couldn't remember thinking or experiencing anything in that time. This state emerged after seeing the fractals and feeling the buzzing, and hearing alien clicking I might add, it felt before it like I was going through a  tunnel. I also felt extremely, distractingly creative for some times, and experienced some pure joy for a while towards the second half of the retreat. The vippasana felt like a failure. I know it wasn't because I worked through the resistance that lingered through it. Regardless I never got into many deep meditative states from it because of all the emotional resistance physical pain, restless energy. My Question is whether this was a result of the low amount of the technique or if this is all fine and good for a first retreat, i.e. was this an error or part of the process.