Bloody hell.
Funnily enough, I think that's how mine kicked off. I was just walking back home from the shops, and all of a sudden my back and legs started to feel achey and weak, then my vision blurred. And I was a good 10 minute walk from home, and all I wanted to do was rest, as my heart was racing like mad, but I had to keep going. Then I nearly blacked out up against a wall, and felt my fingers on my left hand buzz.
At the hospital they said I had a consecutive heart rate of over 160 bpm.
So I'm hoping I'll be alive and be in possession of vision by 2016