Recently I found myself looking at an old alarm clock with a seven-segment display, but the segments were lit up arbitrarily, making an unreadable pattern instead of a time. But then I remembered, oh yeah, that's right, I do have a broken old alarm clock that does that, it's probably just that, I'm not dreaming. And I fell back into the dream.
The funny thing is, I really do have an old alarm clock that does that. It's the most useless alarm clock ever, because not only can it not tell you the time, it can't even tell you if you're awake.