One of my "ah ah"s was the first few days I was wearing libre.
Was wandering around town on holiday, scanning away, just because I could, noticed it trending down, thought, ok, that's going to be a hypo in about 20 mins, so let's have a few grams to tail it off. And it worked - on strips alone, that would probably have been a hypo but it wasn't, because I could see in advance how it was panning out.
After sooo many years of trying to manage a constantly moving target with just strip snapshots and often getting it wrong because of how little the strips told me, I now had a little piece of plastic stuck on my arm which could give me a long heads up on drops so I could sort them.
That was an ah ah moment, because I thought here, at last, after all these years, is a bit of kit which puts me on a level playing field.
PS: jeesh, I'm really disappointed in you guys! - no-one has yet posted a pic in honour of Alan Partridge, the master of ah hah, so I'll do that now to save us all being cursed for disrespecting the king of local radio!
