I love it when that happens!
That's setting the bar pretty low at my house. I only need to get back by 10AM on a weekend.
I live in a house of perpetual early risers (usually 6AM on the weekends, 7 at the latest). So being back before they're up generally means a 4AM wake-up or earlier. I personally can't manage that consistently, but when it works out, its pretty sweet!