About 8 weeks ago for me. Dave left to go do rounds on a Saturday morning, and I was going to go out and do errands in my car. When I stepped around to the driver's side of my car, the back rear tire was flat as a pancake from a nail. That one was easy. A can of Fix-A-Flat and a trip to Discount Tire for a free repair.

The last one before that was much more of an adventure. It was dark and I was going 78 mph southbound on a crowded stretch of the Dallas North Tollway when one of the tires blew. The stability control system on my car made the blowout almost imperceptible, but it wasn't easy to get off the Tollway, and I was going so fast and had to drive such a distance before I got to an exit that I messed up the rim and hubcap in the process. (There's no way for regular passenger vehicles to pull onto the side of the road on that particular stretch, and those who do are very likely to be hit and killed by other cars.) Fortunately, there was a Discount Tire store at the very spot where I exited. So I got lucky. I know how to change tires on everything from bikes to fire trucks, but I prefer for someone else to do that job nowadays.