Good Lord, I'm so sorry to hear that you've fallen down stairs. I hope you're okay, or at least that you'll be feeling better soonest.

I'm going to go download the butter man video, as I'm out and can't be watching much right now. Thanks so much for sharing--I look forward to seeing the conceptual problems.

Take care of yourself. I've class when you're reading in Norwich next week, but I'll see if I can't move things about and make it.