So I had a big "imposter syndrome" experience last week, where I'd prepared lesson plans for a class that meets for four hours. Late in the day prior to the class, the school emailed me and said the course would be taking a different direction and that I would need to prepare four new hours of lessons for the class. Well despite the time crunch I was able to do it and it went just fine. However, my first thought on leaving the school building was, "Looks like I fooled them all for another day." If any colleague had had this experience and told me about it I would be super proud of them and impressed. It's such an absurd dynamic!