Flat tire

Must have picked this up on the way back from Yosemite. Didn't feel anything while driving, though... maybe it happened relatively close to home? Noticed the flat on Sunday, swapped in the spare, and took it to America's Tire today morning. Apparently you can repair tires if the damage is in the tread area (as opposed to the side wall), and they did it for free! Fast, too - in and out in less than half an hour. Awesome.