To update this further (I thew away the first battery)... Today I had another battery go critical.. Which now makes me think the first
DID NOT go critical inside the Saber... This second went critical in my pocket while at work. Was vacuuming and thought a bug was biting my leg... A milisecond of thought brought me to the conclusion that a bite was not what I was feeling.... I'M BEING BURNED!!!!!!! So I pulled the battery out of my pocket and instantly dropped it on the floor as it was HOT HOT HOT, and
SMOKING... grabbed a towel and set it outside on some concrete. Oh and my cell phone got melted....
My conclusion is this:
DO NOT Have multiple 18650's (or any battery) in your pocket with keys, change and your cell phone. This was by no means a problem with the Saber, simply user stupidity/error.
My thought process about putting multiple batteries, keys, change and a cell phone in my pocket: I'M A MAN! I ain't scared of no battery... lmfao! Yea, needless to say batteries will be kept outside of my pockets from now on.

Hope you all enjoyed the story! Glad I wasn't badly hurt being stupid, just got a little burn on my knee.