I nearly had a DKWIAM moment as Emerald traveling in F with a HBO bag that had made it on all other flights so far and was an inch outside of their thingy, but the gate dragon had a facial expression that screamed "I am looking for a fight and honey, you might be the lucky one getting it" so a deep breath and the serenity prayer saw me handing over the bag for gate checking (that was her concession when she realized I was in F (rather than real hold checking)).