Alright now im not going to argue anymore but i am an avid fan of o'ing a hit (holding it in till no smoke is left) and smoking res in desperate times. I am positive i get more fucked up off O'ing for I have done test with the same weed on two different occasions.

Now I can see res having more harmful shit in it but not more then i breath on a daily basis.

What does anyone else think of O'ing?