I honestly thought I wrote this as I was reading. I’ve had the exact same bad experiences, essentially everytime I tried it. First time being the one that started it all where I accidentally ate two full brownies. That scarred me. Second time I almost lost all motor skills for a few minutes. The last time it happened I decided to change the experience when I felt it start. This time, instead of fighting it, I just let go and basically tricked myself into enjoying it and boy was it great. I know the feeling of a bad experience, but tell your mind to take in it and you’ll enjoy it; worked for me at least.