Ok for the big number five I had to pull this out. Never ever, and I repeat Never put a lose 18650 battery in your pocket. The story goes like this.I was actually sitting on the coach and getting my kids ready for school. When they are ready we sit on the couch and talk until we have to go to the bus stop. Well i was sitting and I felt a bit of a warm tingle in my pocket that got worse. I reached my hand in my pocket going what in the world was that? I pull it out real quick b/c I had just burned my finger. As I was emptying my pocket it occurred to me I had a pocket full of change and a Gerber pocket knife. I looked at my finger I had burned and there was the slight impression of George Washington. The only thoughts in my head at that moment were. Well I guess if I can arc a battery with coins and a knife I guess Macgyver's Silver dollar welder isn't a big stretch. I thought this was funny and just wanted to share it with you lovely people as well. Maybe you guys and gals have stories of your own.