dude i am willing to bet your ass your just not inhaling right. Also Edgar is right, if you've only smoked once or twice, you need to keep smoking. I think it was like the 5th time i smoked before i got high cuz i wasnt inhaling right. Just hold it in your lungs as long as you possibly can, its not necessary after about 10 seconds but it will train you you to hold your shit longer, trust me. Take about 5 good hits and hold them in till u feel like ur gonna explode, you will get ripped.