I have found a curiosity with my vaping...it seems to me like I can take a 3-5 second pull off of my Protank or Trident (at the second smallest setting) into the mouth then inhale. This causes explosive coughing more often than not. Even at 6mg. But on the other hand, I can take a 5 second lung inhale off of my Trident wide open at 18mg and suffer no ill effects at all other than clearing my throat once every 6-10 draws. How does that make sense? I am tripling my nic and at least doubling my vapor intake, but my throat and lungs like it. But if I do it at 6mg, I about die off. Is there something in this formula that I'm missing, like air to vapor ratio, or is it just the throat hit killing my on a mouth to lung? Not complaining about the huge clouds, it just makes it very hard to stealth at work or not turn the living room into basically a caramel scented sauna...