A day waking up with a start:

The other week, I woke up with a start and looked at my clock and saw that it was 10am, and then I began freaking out since I was set to take over lecture that day from the prof who I work with and the first class was already at 10:30am.

Then, I realized that it was only Wednesday, and so it was my day to work at home, and the class that I had to sub in for was actually the *next* day.

So, I tried to go back to sleep.