9. Being tired. I'm not an early morning person, which means that I woke up at 3am for the sim, but generally stayed awake until my normal time of 11pm. Then, after I failed the oral, I couldn't sleep that night. When I stepped out of the sim after the checkride, I had been awake for 31 hours. I slept 16 of the next 24 hours. I haven't been that mentally and physically exhausted in a LONG time.