When you sit inside an enclosed place (like a car, a small room, etc.) and smoke up. You will breathe in the smoke in the air, as well as through whatever your smoking out of. Once you get out of the place into fresh air, it hits you real hard and you become really high. Same thing as clam baking.
Like hydroponics, except the plants roots are suspended in air, and sprayed with a nutrient mixture. This is very very cool, and is the cutting edge of plant growing technology. The results are supposed to be even better than with hydroponic systems.