Just curious. I'm not secretly your teacher or anything...
Sounds like someone who's secretly my teacher would say...
I don't think I've ever actually done this to get an entire day off, but there was a time in 11th grade where I used it to go home early. It's kind of an interesting story. It was in math class, and I guess I fell asleep without even realizing it. I fell so deep in sleep that I was dreaming. I dreamt that my classmates and teacher were trying to wake me up, and as I was waking up I could hear my teacher standing next to me and one of my classmates next to me both trying to wake me up. When I did, my teacher was concerned and thought I was ill, because it was so hard for them to wake me up and I was obviously groggy. She sent me to the nurse, and I don't really remember what I talked about with the nurse, but she asked me if I wanted to go home, so of course I said yes lol. I don't know why they thought I was so sick, I don't remember feeling anything other than sleep-deprived.
I can't really say that I was pretending to be sick, because my teacher and the nurse just assumed I was and I didn't tell them I wasn't. I never tried to fake being sick because I never thought I could get away with it.