The 100-foot-high wave, the little stream that suddenly becomes a raging torrent, the gale that topples trees, lorries and people. And the deadly power of the thunderbolt. Q.E.D. looks at the violence of freak weather. And, to explore our chances of surviving, John Lees, the 'Q.E.D. Test-Man', takes on the power of nature. To simulate a flash-flood, he stands below a 200-million-gallon reservoir as the sluices are progressively opened. He battles against a man-made hurricane until he blows away. And shows how to be within an inch of a direct lightning-strike - and survive.