Warning signs

One of the things I love about having diabetes are those pesky hypos in the middle of the night. Like last night. I thought it was the cat's purring that had woken me up and I tried to get her to shut up (in the nicest possible way of course) but I was aware that something wasn't right. One, I was still awake, two, I was hungry, three, I felt odd and the clincher: I could read the display on the clock without my glasses, a feat I can normally only accomplish by squinting really well.
What I don't understand is why sometimes the warning signs are subtle, sometimes I get increased vision, sometimes I can't see at all, and sometimes they are horribly obvious i.e. the full-on shakes and sweats incident. The lowness of the BG doesn't seem to have any effect on the severity of the symptoms, I can feel hungry at 43 and 27, I can get flashy lights in my eyes at those numbers too. And no, alcohol doesn't play any part in what kind of hypo warning signs I get or how severe they might be.
What I don't want in the middle of the night though, is to wake up, work out why I've woken up, deal with the hypo in whatever shape it comes and then go back to bed. I just want to roll over and go back to sleep. And I definitely don't want to have to feed at that time.
So if anyone knows of a magic excess insulin sucking up device that I could just stick in my body at the first sign of low BG could they send me details? Thanks.