From my experience....crack. I took ONE hit ONCE and had a great euphoric feeling for about 30 seconds which was followed by the most intense feeling of NEEDING MORE MORE MORE MORE!! and it scared the shit out of me. I felt so dirty and disgusted at my cravings. I sat and watched my friend give in to his cravings and he looked so pathetic and out of control and it was sad to see him succumb. I got the hell out of there and fast. He did the rest of the piece and went for more,then more, and before morning came he was broke.He was disgusted and ashamed and scared because he wanted to do it again, even though it hurt him so bad so quickly. Thats a scary drug. You never know until you take a hit if you are one of the ones instantly hooked/addicted and headed downwards, and maybe even unable to buy groceries for your child because you smoked it all away.