When I was younger I experimented quite a bit with acid. Now in my fifties, I no longer use recreational drugs. A while back I tried this I-Doser and had somewhat the same experiences as being on acid. It started with cold shivers up and down my spine and then started laughing for no particular reason and started to have audial and visionary hallucinations that were quite strong. I think the reason that this effect was so strong was from having past flashbacks and this program somehow triggered or mimicked those flashbacks.