During my first vaping months I was occasionally forgetting to lock my regulated mod before putting it in my pocket so one time it did fire on me at 140 watts for like maybe one and a half seconds or so, but the coil build I had in there had a bit of a slow-ish ramp up and my wicks weren't completely dry so nothing bad happened to them. Nowadays in my pocket I only carry a tube mech with a flush or somewhat recessed button, the button throw of which is firm enough and the design/construction of which is the kind that can't cause it to start auto-firing inside my pocket, and the mechanics of which I have familiarized myself with thoroughly so that there can be no surprises there, either. Before I put a mod (any mod) into my pocket, I wrap it in an upside down, regular type deep freezer food storage 3 liter (~1/4 gallon) plastic (PVC plastic) bag that has no ziploc or anything, mainly to protect the inside of my atomizer against dust specks wandering around and also just in case something might still leak a little bit. That is, despite my Reload RTAs never leak. (I have two of 'em... they're the only RTAs I have, rest are half a bucket filled with RDAs because I hate all atomizers that aren't RDAs, with only one exception, and that's the Reload RTA, which I like for the fact it's the only thing that actually vapes and tastes almost like an RDA.) Also before I pull the plastic bag over it, if it's one of my RDAs, then to keep it from leaking I vape it almost dry. (I can feel it on the vape when it's getting almost dry, so I can vape it almost dry with no effort and without getting a dry hit.) Finally, to keep the plastic bag from trapping the tiny bit of cooldown-vapor exhaust that tends to ravish the flavor, I always remember to wait and or blow onto the coils a few times to cool them down.