it was such a phase for me. a very short phase, when i was drunk or in my friends car. just when i was 17. now its very very very rare. its just stupid and wayyyyy too addictive. you dont think you are, but when something bad happens, like someone you are close to dies, its weird, you like crazy one so strongly. i was able to beat that craving though. the effects arent worth the unhealthyness, smell, and negative response you get from some kids.