Negative effects of machine?

I crossed paths with someone recently who was in the process of learning how to use one of these. I let him hook me and I was impressed by the accuracy of the reading however, part way through it my heart started pounding heavily, I became dizzy and felt as though I were drunk. It felt like having an anxiety attack. I asked him to stop and he said it was from "rewarding" my body with endorphins and he turned that part off. I only managed to sleep about 45 minutes that night due to my heart racing, and I've been concerned about it since.
I have not seen this person again, nor will, but would just like to know if anyone has input on this experience? Tweet