You have double-checked the time and place of the class and you are in the right place at the right time, but no one else is there. After 5 minutes of racking your brain to come up with a person dastardly enough to play this cruel joke on you, the door opens and your students pile in together. Turns out, they all have the same class before discussion session that ended a little late. You make a note of this, in case they are tardy again, and proceed with class as planned.
Scenario 4: You think, “Everyone is in the wrong room but me”!