LOL, reminds me of an incident I had a couple of days ago. I too
vape very discretely at work, go outside when I need a good vape.
Anyways, I was sitting at my desk working and started smelling something, smelled like perfume or something, looked around to see if any hot babes were standing behind me, nothing, went back to work. Few minutes latter started smelling a definite oder, stood up and for some reason started patting my pants, my pocket was burning up, started to panic it was my e-cig going off in my pocket and got it out and it was very hot (I mean burning hot). I was having visions of going up in flames right there in my cube (e.g. how would I explain this).
I have the screwdriver which has a touchy button that can easily be turned on when in your pants pocket, usually wear a shirt with pocket and keep it there, not today though.