I did once in school, my last year of it. They wanted to expel me to make an example out of me. While my younger sibling did it as a matter of course and would only get detention.
Once, I slept in homeroom for the entire day because I was unable to move, because I was extremely sick. I slowly got myself from the entrance to the classroom, which made me 15 minutes late, and then I lay my head on my desk and slept. Also for about a week during that time, everything including water tasted like iron.
Mentally? Pffft~~, 'course not~~~