In the August 13, 2009, issue of the British tabloid, The Sun (as reported in Patti Wigington's Paganism/Wicca blog on About.com), a woman named Kim Yeates made a big mistake. She had a small crystal ball, just 4" in diameter, that had cost her about $33.00 (20 British Pounds Stirling). She left it in her window while she was visiting friends. Like a magnifying glass, it compressed the light from the sun coming through the window to a small point...on the back of her TV set. The TV exploded and set fire to her sofa. When she returned to her apartment, she discovered over $16,000 worth of damage.
Destruction from tools isn't that uncommon. I can't count all of the homes I've been to