I don’t think anyone with diabetes can avoid an occasional major hyperglycemia event. You recovered quite nicely, however. I can remember many time before I started on a CGM that a high like you had led me to over-treating, going low, and then high again. And that could go on for 12 hours or more!
Last Sunday I changed infusion sets at the same time as I changed my CGM sensor. I finger-poked during the two hour CGM blackout and I watched my blood glucose go up, up, up. I topped out at 219 (12.2) and guessed that my newly placed infusion site might be faulty. When I swapped it out early, a light tint of blood in the cannula confirmed my suspicion. I was out of range (>140, 7.8) for 4.5 hours. Argh!
I used Afrezza and one IM shot to return me to range. This chance event reinforced my philosophy to take full credit when I’m in range and simply blame it on diabetes when I’m out of range. Many things are out of our control when it comes to glucose metabolism.