Trees produce oxygen, ya know

1. We are headed off to spend two nights in a treehouse. 2. This was Husband's doing. On the way back The Mud Run he saw a sign and said, 'I've heard good things about that.' 3. When he got home he began to describe it to me. What I heard was: 'No need to pack tent, sleeping bags, and there is indoor plumbing.' 4. When booking the accomodation Husband noted that they come with safety ratings. Recalling Thing 2's spectacular fall off a loft ladder which resulted in a cracked skull, he selected the one they recommended for insane...