Thank you, Lang.
” However, some reported that their bodies disappeared at times.”
– Yes. There are billions of types of samadhi. Some good and some bad. Whatever one may focus one’s attention on, one may get a corresponding result. Some can see lights, some feel that the body has disappeared, etc.
– But there are only 4 (or 5 depending on whether the first jhana is split into two) rupavacara jhana and 4 arupavacara jhana. See, “Jhānic Experience in Detail – Sāmaññaphala Sutta (DN 2)”
– Many people get confused between samadhi and jhana.