I have twice fallen in public places when I was completely sober. Once in the busy intersection of Queen's University immediately after handing in a paper. I blame it on lack of sleep.
The second time occurred when I worked at Ogilvy in Toronto. I was running along the 11th floor accounting hallway and bam I was down. No warning nothing.
When I saw this, you would think I would be compassionate given my sketchy past and my own fashion victim status. Nope, I whooped with laughter. I hope you do too.