Not so startling turn of events

Just now, for about 15 seconds or so, though in many ways it felt far longer than that, my heart did this weird speed jogging thing that left me dizzy and clouded my vision. At least I assume it was my heart. After all, I'm not a doctor, pharmacist or healer of any stripe. If I don't take steps to correct my behaviours and the vices that so steadfastly accompany them, and this presumed coronary incident is any indication, my dream of joining the Riverdance contingent is all but dead.