A Responsible Doppelgänger
What started off as a regular sick day turned into something very eerie for this student. They woke up with a fever and had to stay home from school. However, they had a major exam that day and were concerned about missing it. By a miracle and some flu medicine, they felt good enough to show up to school in time for the exam.
The thing was, all of their other classmates thought they WERE already at school. Several of their friends swore on their life that our storyteller had been in the first class of the day. Multiple people had seen them, which should have been impossible. Either this storyteller has a very responsible doppelgänger, or their classmates were on autopilot that morning.