I have always heard this but have never seen a significance, the office was open after the power down and explosives would have been noticable. Also, if you notice there are a few spelling errors so I thought it could be a twoofer's lie. Also notice how he doesn't work on Tuesday and he puts 'engineers' in quotes as a troofer would. Has this been debunked anywhere?
http://www.serendipity.li/wot/forbes01.htm
http://www.serendipity.li/wot/forbes01.htm