That first one is a form of wry (raw?) humour :) It reminds me of a dream I had last night. I was back teaching and needed photocopies so I left the classroom and got distracted and forgot to go back. Yeah, those were the kind of nightmares I'd have while teaching - funny though, I taught many rapists and murderers not to mention gangbangers, but I'd always have nightmares about missing a class...strange, lol
I can understand why you would want to miss the class?
ha ha...so true :)