the other day, I got a 5 pack of cartridges from Greensmoke. Of course the first one I reach for is my favorite flavor - Coffee. I put it in, and take a few starting puffs. I heard a snapping sound coming from the cartridge and thought "okay, well I've heard crackling before.. so maybe this is just a fresher cartridge" I took another puff, and felt a very painful shock go to my tongue!
I shook it off and thought "okay, maybe it just needs to be warmed up a bit more" took a few more puffs, and every single puff shocked my tongue.
I'm scared to try another cartridge now. What happened?

I'm scared to try another cartridge now. What happened?