In my world, I downloaded the new IC2 version, got up a whole bunch of crossbreeders going, and thought to myself "This is going to take a while. Wasn't there an abandoned mineshaft not far from my workshop?" So I get my tools together, charge into the mineshaft, suffer many close shaves, stayed a bit longer than is probably healthy, but emerge from the experience all the wiser (literally, I gained several levels), and with oodles of melon and pumpkins seeds to boot.
And come home to find out that weeds have destroyed my entire farm.