The previous time someone pointed out a flat tire was in Valence France, I was pushing my bike because my left arm was in a cast, I'd broke it a couple of days before. The man not only pointed out the flat tire but he fixed it as well! He was a master, fixing the flat without taking the wheel off and re-inflating it for me in about 5 minutes. I was so grateful I was going to tip him my last 12 euros and then I found my wallet had been lifted. The same man recovered it for me. (I'll never know but I suspect he was the lifter. All the cash was gone but my credit cards etc were still there.) All in all quite a day.