I've been getting high for like 12yrs.and I have never had this happened before. I hit in my arm after trying everywhere for 45min I saw blood and was stoked. I felt the warm itchys then metallic taste in my mouth then red blotches everywhere then I got all shaky like I shot coke.after that a big head ache it lasted 10 min or so.this happened once before but I hit in the base of my neck where it meets my chest I thought it was because of where I hit but in my arm this time. No one else had this reaction and I get high with the same people everyday.we've been getting high together for 10yrs. We are both at a loss.I don't really have any veins to think the few I can still see are dangerous just sucks ass! Has this happend to anyone else?