While this is unreal, it is really not that hard to believe. An Albany, Ga. apartment was rocked by an explosion when nine roach foggers [Yep, that's 9! They must have had a major problem to deal with, yuch!] were set off before the family departed. The fumes were ignited by a pilot light, and the resulting explosion was so fierce that that it moved the roof.

I guess when the manufacturer recommends three roach bombs maximum, he means it!

Here is a link to an article and video .