It's time for Wolfspirit's informative but lengthy and annoying interjections.
For the impatient: Darwin gets the highest number of lightning strikes per year in the world, as opposed to any other city. Lightning tracers exist, and they are hella slow. Lightning strikes upwards. If you are hit by lightning, you are screwed.
For the interested: Darwin gets the highest number of lightning strikes per year in the world, as opposed to any other city. Although this dubious claim to fame is also forged through ignorance; no-one measures the amount of lightning in most regions of Papa New Guinea, for instance, and the climate is very similiar. There's no reason why there would produce any less, or any more, lightning strikes then here; but we'll never know. As I said, I tend to view this with some slight skeptisism; it may, indeed, be true, but there are vast amounts of the Northern Territory, Indonesia, northern Queensland and Western Australia in which lightning studies do not occur, so it would stand to reason that there could be places with more strikes existing in the world; but, as for recorded scientific fact, this city has the most lightning strikes in the world.
Lightning tracers, as they are known, exist. TopGun is correct. However, there is one thing that is worth noting; they move MUCH slower then lightning. No-one knows why, at least, I don't think anyone knows why. When one is about to to be struck by lightning, your hair stands on end, and your vision goes red. You have about a second to lay flat on the ground, drop and move (jump) far away from any metal you are holding or to get low enough so that the lightning finds a shorter target, as lightning travels through the shortest, most conductive path from the cloud to the earth. This is due to the constant presence of positive ions on or near the surface of the earth, corresponding to a build up of negative ions which are generated by static eletricity in the clouds; all those water molocules rubbing together and whatnot, all generating negative charges. When the negative charges become close to 'cridical mass', ie enough charge to generate the lightning strike, the lightning tracer forms. The positive ions in the earth are attracted to the surface, and to the highest point; you.
Now, this is not entirely correct. The lightning tends to favor the tallest object, but this is not exclusive; if the tallest object in a field is a rubber pole, and there is a statue one or two metre's shorter but made out of metal standing at the other side of the field, then the statue will be struck and not the pole. However, if there was a small disk of metal laying on the ground, and beside that was a tree, the tree would get struck; there's a formula for it, based upon the conductivity of the object and it's height, but it excapes me at the moment. But, I digress.
This build up of ions causes your blood to thicken slightly, and for some reason, to become attracted to the top of your body; possibly because your blood carries a slight negative charge due to the constant movement inside your body. The blood vessels in your eyes are extremely sensitive, and the thickening of the blood causes them to become visible; resulting in a red blur forming over one's vision. The effect is similar to a 'red out' suffered by fighter pilets enduring large amounts of negative gravity forces, or negative G's. The hairs on the legs, arms, and back of the neck often stand on end as well; the same principle can be observed when rubbing an inflated ballon against the skin or touching a Vann generator when wearing rubber soled shoes.
It is at this point that the 'tracer' forms. This tracer often originates from the top of the head, or the back of the neck or forehead if one has very thick hair, extending about ten to one hundred metres up into the air. And then, after a second or two, assuming that you are still the sexist thing available to a potential lightning strike, the current passes up through your legs, up your body, through the path taken by the streamer and then up to the sky. There is a 'blowback' up above the clouds; anyone who has flown above a thunderstorm in an aeroplane will vouch for this, and I have seen it with my very eyes. There is a 'flash' of conial light up from the contact point of the lightning strike on the cloud, which extends about one-half the length of the strike, but that is just my observation, I could be wrong as my perspective was skewed at the time.
This is why many lightning strike victems loose their toes or have severe burns on the feet. The current hits there first, and that is the part of the body that takes the most damage; in addition, there is a lot of liquid in the feet (blood, sinovial fluid, etc) and this all adds to the water content of the medium, which naturally improves it's conductivity as water is a prime conductor of electricity. This is not to say that burns do not occur elsewhere; they most certainly do. But, the main danger is not the burns, but rather the current's effect on the nervous system and the muscles. Most deaths from lightning strikes are actually strokes, which occur because the extremely strong current disrupts the muscles of the heart; as myself know, when one is severely electrocuted, the muscles squeeze and tighten; the heart is a muscle, just like those in your arms, and the shock can cause it to squeeze and not unsqueeze (total cardiac arrest), or cause it to beat irregularly for a time (a less dangerous, but still serious, condition as apart from any immediate consequences it could cause a cardiac arrest at a later time).
As I'm finishing this, I should probably point out that I am now no longer sure if it is the buildup of positive ions in the air or in the ground; it is one or the other, and of little consequence. The principle remains unchanced. If I find out at a later stage, I'll post here.