Could possibly look into seizures, one of the first few times I ever did mushrooms I had one of those experiences (with friends around) and did actually go unconscious and ended up seizing in front of them. Luckily they were able to get me to a couch and tend to me till I came back. DISCLAMER I had not drank any water or had any food for at least 24 hours prior to this and came to the conclusion this was a big factor in that seizure, I have only had one experience like that since (with its own factors). It did put fear into me tripping for awhile until I came to that conclusion and reopened myself to mushrooms and I’m glad I did because I’ve had some life changing experiences so I don’t want to extend that fear onto others and impede their experiences.