Homer Simpson, UX consultant

I’m usually down on user experiences that flout convention. And, generally speaking, error messages are not the time and place to get clever. But I make an exception for Word Shaker, an acrostic word finder game on my iPhone. If you are playing against the clock, you can shake your phone to shuffle the letters, thus creating more words to find. But if you play in “casual mode,” that feature is intentionally disabled. If you try to use it, you’ll see this: