I have a couple of briskets on. One is 13 lbs and one is 10 lbs. I started them about 2pm today. I have had a few temperature fluctuations, but for the most part, I've kept a consistent 225-250. What's upsetting me is the fact that I just checked my IT out of curiosity, and one is already finished! It's only been 8 hours. I have an electronic thermometer. I checked its accuracy today with boiling water. It read correctly. And yes, it's in the thickest part of the brisket, and I inserted it sideways, so it's not protruding through the other side of the brisket. So now I'm really upset because my bark hasn't even had time to get thick and crusty. Will it hurt if I leave it in the smoke until I'm satisfied with my bark? I pray someone is still up and sees this post tonight!!!!!!!!!!!