While sitting and having a vape while watching t.v. I heard a noise that sounded like a mod firing.I checked my gear and nothing seemed amiss until I noticed smoke coming from my Patriot RDA sitting atop my formally trusty ipv 2 mini 70w.I quickly secured the situation and discovered my mod was auto firing, I was not using this mod nor have I ever had an issue w/ it.Now it fires continuously until I remove the battery. I pretty much chalked this mod up and I'm glad a potentially bad situation was skirted. Any ideas on what caused this?