Here on the box about lightning talk, and I remembered a couple of moments.

In the 1970s and 1980s there was a completely Gestapo Department of Electrical Engineering in Riga.
This beast beat everyone and everything, including the threat.

1st My mother was from a pre-war Belarusian village, and in any storm she demanded to close the windows.
“Let the lightning not pass.” I, as an advanced and calculated pioneer, and later a komsomol, repeatedly and unsuccessfully explained to her that the lightning does not fly, but shines from top to bottom, the open window is like it.
And suddenly these, from the department, tell that the warm air rising from an open oak or door can create an ionizing canal up to hundreds of meters high!
It really can fly. Right in the window.
Forgive me Mom.

2nd We calculate all these contours, engraved in the ground, the cone of the protection zones of lightning discharges, etc. and so on, we pay off, and uff...

Prepod stands up, and moving toward the exit suddenly stops, turns around and pronounces "...all this is so, but during the construction of the Ostank TV tower lightning killed the worker at the foot, when this structure, hanged with steel wires reached a height of more than two hundred meters..."

And suddenly something bad and worrisome became after the newly filed account.