[Off-topic] hanmin:
Niiccceee.. good that my explaination has someone to read it in details. I'm so worried that my stuff will get everyone to sleep. Anyway...

You are right that the induction from a lighting can toast your phone, lan and power line. However, as these lines are not long and straight enough anywhere near the PC, the fatal induction is actually caused by somewhere along the way to your company (e.g. from the phone exchange, along the telephone pole/underground, to your company). Your PC will be safe from lightling if it is disconnection from possible external induction source (e.g. the phone line to the outside world). I'm happy to put myself inside the PC case (if it is big enough) for a lighting strike :)

Some history lesson for all. Edison called the AC the killer current mainly because of the business competition between the DC and AC business. As Edison has spent a lot of money and effort just to change the public point of view on the safety of electricity, and just as the business is getting some money... this Tesla (I think) guy made AC electricity and business is good (cost:profit ratio), due to the fact that AC has a certain edge on long distance transfer (I'll omit the details on this). Hence, Edison is trying very very hard to make AC look dangerous, by killing innocent animals (in some cases, virtually just cook it), and eventually, co-invented the electric chair.

In the view of the danger of DC current, it is a false impression of most people thinking that DC current is safe, mainly because the DC current we normally exposed to are low voltage DC current (e.g. batteries and phone charger). However, in strict AC/DC defination, a lighting strike is a DC current. And, I think a Taser gun uses DC too (you would certainly need to use some form of capasitor to store enough voltage for a shock, using regular batteries), unless the battery use is exceptionally designed for it.

Anyone has a Taser to confirm this? Does it gives out a buzzing sound from low to high frequency when armed some AA batteries operated cameras with powerful flash will have the same buzzing noise, indicating that the capacitor is charging, ready for the flash).

As for your statement of "AC can not 'flow away' to neutral, it wants to go to

earth/ground.", I'm not sure if you really meant "can not", or "not only". Anyway, all AC electric stuff, electrons goes between live/neutral, and does not require the earth/ground to be functional (not safely, at least).

If you remember some electric circuit theory, if caes where you have two parallel line (AC or DC), with one line much lower resistance (i.e. shorter distance between live and neutral) compared to the other (longer distance to 'ground' where 'ground' is not designed to pair with live), majority of the current will go through the lower resistance route and hence current that goes through the high resistance route maybe very well harmless. HOWEVER, there are cases where the current in through the high resistance route is harmful, that are in the cases where the current going through the low resistance route is excessive high. Example, the low:high resistance current ratio may be 100:1. If it takes (say) 1A to be fatal, the other route will need to have 100A (which will have all fuses nuked - e.g. my house has a main fuse of about 80A for both the heater and the cooker). That's what mentioned on my post above around the "consider that the current is increased..." section. And, as for the case with extreme high current, apply the Faraday thing mentioned on your first paragraph.

Take the Taser gun for example. If you were read the user manual, there is a minimal distance requirement between you and the target, due the the fact that the probes triangular trajectory path. Being too close to the target, will cause the probes to be too closely attached, not giving enough muscle area to 'disable' the target. The electron will not spread around (like clouds) through all the muscle, just the shortest route to the other probe (there may be current through other muscles, but too small to be noticeable).

Where in the Western societies are you in now? US? Nice... in the UK, you are/not so lucky, as you dont get very much pure water over the tap. UK is on hardwater, which seemingly adding mineral to the diet, probably in such situation, protect us from electrocution? If you were to be 1+ hours around London, take a bit of tap water, leave it on any surface and leave it for it to evaporate. At the end of the day, you'll get a pile of white powder. Yes, it is this bad.

As for the ECG issue, it goes the same with the low-vs-high resistance route. I'm sure it wont work underwater (dirty water?). However, still, it is a better conductor than many things.