I very seldom use Crystal but 2 nights ago until this morning myself and a friend had been smoking some . Well it was maybe a 40$ but good product .. I've been trying to relax I didn't feel bad but I started having some strange pains in my arm slight numbness at times and it tends to go down my arm some.. I felt faint a bit ago none of this has gone on any of the other times ive used it .I'm just curious what might cause this I ate even had Gatorade and my normal vitamins .