Sadly, this one was me (face, meet fist).
Over the weekend I drove down to Chicago to visit family. On Sunday my phone died and the only charger I had used the car plug. So, when we went to Friday's for lunch, I drove (normally I would rent a bike or take the bus) so I could plug my phone in and get enough juice to make sure no one was trying to get a-hold of me.
In the end it was 4-5 miles of driving (rt) and $4 in the meter, because I didn't think to pack a wall charger.
Edit: In Wall of Shame and Comedy to see if anyone else here has a story of a minor cost for a stupid (and seemingly unrelated) reason.