i didn't do it

Visited one of my favorite blogs this evening and discovered this where the home page should have been: (click to enlarge)

I cannot be the only person who looked at that page, had a heart-stopping "oh shit!" moment of anxiety, and then thought, "Wait, this isn't my site. My code had nothing to do with this. Whew." Sadly, I've seen that error message (or one just like it) on my own pages many times.