@a1dedbb4 Thank you so much. I'm literally (figuratively) mortified. But at least I could turn up for half the lesson, which was something, I guess. The student was very nice about it. And so were the school. Just as long as it doesn't happen too often. It's not going to happen to me for a long while, I hope! 

 @2184a19c wow you made it to class, though - that's excellent!

Of course it won't happen often - it hasn't happened often in the past, right?  

Glad the people were nice to you about it, that's as it should be. 

 @a1dedbb4 Yes, thanks. You're right.