This is weird

This breaks Notepad in that it causes it to display very oddly. No permanent damage comes of the following steps. I promise, it's just very weird.

Here's how to do it:
1. Open up Notepad (not Wordpad, not Word or any other word processor)
2. Type in this sentence exactly (without quotes): "this app can break"
3. Save the file to your hard drive.
4. Close Notepad
5. Open the saved file by double clicking it.

Instead of seeing your sentence, you should see a series of squares. For whatever reason, Notepad can't figure out what to do with that series of characters and breaks.