Help me think of a good excuse for not showing up to work yesterday?

I skipped work without calling or anything. Usually if I'm late, someone from work calls or texts. If they had contacted me, I would have probably said I was running late but on my way. But I really wanted to skip since I was extra tired and not in the mood for work. My job isn't that important... I won't get fired. It's a job you can get away doing this stuff from time to time. I come in 1/2 hour or more late on a weekly basis... But I still want to have a good excuse. I was thinking either that my mom/grandma got sick (with swine flu? my mom actually had problems with her back yesterday) and I had to stay with my family an extra day (they live a couple hours drive away); or say my car broke down on the way back; or say that I was sick (migraine or something) and was sleeping so I didn't get a chance to call. Any other ideas?? Which one sounds the best? I'm not worried about getting fired at all, but want to have something decent to say tomorrow if I get talked to. 10 POINTS BEST ANSWER!!!!!!!