First cook on the new XL, spatchcock fantastic. Fire department? Not so much...

Let me start off by saying - all is well. There was no fire and no one and nothing was harmed. Picked up my XL last weekend. It's been living in the back of my car (my kids have dubbed it "grandpappy's mobile home") until my nest handler came in and I could get it out. The transfer was super easy...was able to get it out of the car and into the nest/handler with just me and my 70 step-father. Love him. At the dealer picking up my handler, I may or may not have gone a little crazy....every type of Dizzy Pig (reserving judgement, but quick taste-testing doesn't have anyone standing out over any other commercial rubs I've tried), split CI grate, pizza stone, fire bricks, half pizza stone (although I gave that to my parents tonight. They won the large last weekend and will probably use it more than I will.) Already bought the stainless cap and thermopen when I picked up the XL. Have to admit, wouldn't have thought it, but yeah...the thermopen really is a game changer. So, yesterday the XL came out of the car and into the nest. It is just as ridiculously large in the nest as it looked in my car, lol. Did a spatchcock on it, sprinkled with Tsunami. Chicken turned out great...wondering why someone would bother to cook upright when spatchcocking turns out so well. Yummers. Shut the egg down (just with stainless, not with ceramic...first mistake) and let it cool until what I thought was a safe temp. Was going to leave it in the front yard until completely cool and then I started thinking that it was a mighty big ticket item to leave in the front yard....and wheeled it into my garage. Made sure there was plenty of room (although at this point it was safe to the touch), took my kids to their grandparents, and went to spend the night at BF's house. 12:30 this morning, ADT gets the alarm from my house that the Carbon monoxide monitor is going off. I don't get the call, as I'm out of range of cell service. My emergency contacts get it. Fire department comes. They didn't break down the door because they figured that no one was home, but it did cause some panic among our local volunteers. (Are they really gone or just unable to answer the door?) As I said, no one was hurt....but serious lesson learned. I have my CM meter right outside my boys' bedroom....which is also right over the garage. It did exactly what is was supposed to do, as did ADT and the fire department. I feel like an ass. Lesson learned - egg does NOT go back into the garage until I can actually touch coal to know that it is completely out. Now I just have to figure out how to get it to cool down completely without worrying about it hanging out in front of my house...first world problems. On another topic....the nest handler pretty much rocks.