Ok, sure, you're an idiot.
But I'm afraid I have you (and every other living thing in the history of mankind) beat by a wide margin. Here's how it went .....
The cage needed new wiper blades, so I proceed to tackle this very simple task by pulling the wiper back against the spring that holds it against the windshield to gain better access to blade, right? I then remove the blades, so that all that remains is the steel bar that holds the blade. Not paying real close attention (because this is such a simple task, remember?) I turn around to get the new blade and just brush up against steel bar referenced above. Remember the spring mentioned further above? Well, she brought that steel bar right back to the windshield with extreme prejudice ......... SMASH! Time to get a new windshield.
See, I told you I was a bigger idiot that you.
This could actually be a fun thread if everyone chimed in on some of the stupid things they have done.
<**crickets**>