[DeFault User]

I hate it when that happens.

Yep, that does sound like one of those adolescent nightmares, no pants in school.

[FredZarguna]

It's actually a common teacher's nightmare. There is also a variation of the "went to final and discovered I had never been to class" that teachers have as well: "started the morning lesson and realized I knew nothing about it."

For some teachers that's reality, not a nightmare. In which case a pantless appearance may be a desperate attempt at distraction...