The morning after Princess Diana died, I had been on an all nighter and was due to operate the SIM in stavanger for an IFR sortie.
The wheels went up, I fell asleep, the students flew a 90 minute sortie. As we "landed", I woke up. They couldn't understand why they had managed to get in to the destination and why all the engines were working. One of them was a senior officer who turned against me forever after that. He spent years trying to get me into bother, even lying to the station commander at station execs meetings.
I stayed sober for hours after that one...........