share your public speaking disasters

Over at the Speaker Confessions blog, author Scott Berkun wants you to share your own worst public-speaking disaster--and he's offering prizes, of course, as a lure. Any story can get you mentioned in his upcoming book on bad experiences for public speakers (whether newbies or seasoned), and three winners will get an Amazon.com $100 (first prize) or second prizes of $50 each. You may want to read the burgeoning list of disasters contributed in the comments, both as a reminder of what might go wrong and to feel better about your last speech!