I might try something like that cause I vape alot. But I puttin' no bag over my head. That just seems ultra-stupid to do. Maybe I'll exhale hits in a shopping bag or something then try to breathe that when I'm done vaping. 30%?. Cool. The most buzz from a any given amount of bud is a goal worthy of pursuit. But does seem kind of ghetto. Maybe somebody can answer me this: I started smoking back in about 1970. Shotguns don't seem to be as prevelent now as they used to be. Why? They're real social and a real blast (really) to get. Maybe people think it's gay or something? Too bad.