All's well that ends well. Just wanted to thank those of you who gave me advice and hugs. I was completely stressed out over this, and now that I look at all of the data I "collected," it's obvious it was a site issue, where the cannula was bent or something. It's too bad that I had to let him deal with 24 hours of no insulin before I realized this (mostly because I had JUST changed his site when the numbers started to climb) but, alas....add one more thing that I've learned to the list.
His numbers are fine now - back to regularly scheduled programming. Whatever that is.