I replaced one on the side of the expressway with nothing but hand tools.
I was on the way to wedding in which I was the best man. It was friday after 5:00. I was right under an overpass when it failed. I didn't have a spare belt, I thought I was screwed. I walked up to the pass road to find nothing but a bar. I walked into the bar and explained my problem to the bartender. He yelled across the bar "hey Charlie come here!" Charlie came over and the bartender said "tell him your story". Charlie said "I have a couple old Mustang IIs at my house if worst comes to worst but, let me make some phone calls". I sat at the bar and slowly drank a few colas. About an hour later he walked through the door with a brand new timing belt. It turns out that a friend in a near by city opened a parts store for him and got me a timing belt! Is that cool or what. I tried to pay him extra and he refused, He would only take the amount on the receipt. It was $14 and change. That was years ago though. About 20 minutes later I was flying down the expressway again.