This is probably logic, but I'll say it anyway. 2 night ago one beast of a storm pased right over my town (Stevenage, in the approach path of Luton and Stansted, UK). It was about 4AM and I was still up (Sleepless night) and I heard the storm approaching, so I thought 'oh cool, some light entertainment' well, I got more than I bargained for, I thought the storm was still about 5 miles behind the house and it decided to suprise me while I had my arm hanging out of the window. A huge BALL of lightning, not more than 300 yards ahead of me cracked and what must have been 250,000volts decided to shoot up my arm, through me, and into my 'earthed' radiator that I was leaning on. It through me back onto the other side of the wall. Now, anyway, that's my experience, and now here my warning: Obviously, don't hang your arm out of the windows during a major lightning storm and secondly, if you have any wire that run outside your house, such as telephone extention wires for internal modems, be sure to unplug your modem from them if a storm is occuring. My internal modem is now a melted peice of plastic and components. I was able to pry it out of the motherboard which was not damaged. I'm now running on a 56K external backup modem which I've had for about 3 years.
Be carful during a lightning storm.