I discovered myself that if you take a hit of crack (decent size) in an enclosed area, like your car, or small bathroom in the shower with the shower door closed and the bathroom door closed, you get a much stronger, and amazing hit that will blow your head off!
My best places are my SUV with all the windows and doors closed, my small master bathroom on the floor of the shower with the shower door shut and the bathroom door closed as well. A closet would also work if you do not set its contents on fire!
It makes such a difference, and I do not remember anyone telling me about this. Try it, what have you got to lose?