Anyone living in or around Edmonton, Alberta has heard about this. In a nutshell, the police suspect that a guy was trying to commit suicide by blowing himself up. Not only did he succeed, but he overshot the mark and took out an entire city block with him, to and including all the people living in the houses on either side of his own. Needless to say, that's a big ole "whoops." Focus: What's the biggest mistake you've ever made, that resulted in harm to you or an innocent bystander/friend? Tell us your story.