Hi everyone. this is my first post and i joined to ask something that was on my mind. i use a phix by MLV, and sometimes in class i get super nic'd out. i found that if i take a hit, hold it and breath in again when i breath out no vapor comes out. it's great because no one will think anything of me breathing kind of deeply. but will it harm me, holding in all the vapor? thanks to everyone who responds
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from General Vaping Discussion http://ift.tt/2kFswL2
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