Yes. Recently actually (although I was 'okay'... and I did have food, just probably not the quickest acting food).
The example that comes to my mind though - a few years ago I went for an evening walk. I was fine when I set off and I knew it was a relatively short walk of about 4kms (two uphill and then two kms downhill). I'd had my main meal, and although the details are sketchy now, I think I honestly thought I'd be fine - and knowing me I probably based that decision on years of diabetes experience... it wouldn't have been something I took lightly. Usually I take a backpack with meter, money, phone, food - or at the very least put a bag of lollies in my pocket and a phone ... this time, for some weird reason, I took just myself and my house keys. I almost never do this so I'm not sure why I did it on that occasion.
So I get up the hill (which is actually on a pretty major road...), and begin to feel hypo. Although it was light when I started walking, it was now dark. But the return trip is down hill so I think "Well, I'll just get a move on and I'll be down the bottom before I know it".
Hmmmm. I get about half way and realise how incredibly vulnerable I am... walking with no phone, no food, no money, no id... and then I begin to get the stumbles... you know when your legs don't want to support your weight. So I fall over - a few times. That's when the panic just completely overtook me and maybe that was a good thing because after a while I was actually able to stand up again and keep walking (albeit on wobbly legs). It was the longest km I've ever walked! I had to lean on lots of fences along the way. Anyway, I made it. Reaching my house and seeing my husband through the window is still one of my all time most comforting sights.
Glad you were okay alacrityvirtue. It certainly is scary. I'm usually very careful about taking phone, keys, ID, some sort of food and money with me, particularly since then ... I think (given enough time) a lot of us end up getting caught out at some stage.