In June I had 3 flats on the same wheel in the same morning. First getting ready for the ride I topped off the air with a floor pump and blew the valve off (but the tube was 20 years old -- so it was my fault for not replacing it sooner). Then the tube I replaced it with flatted on the road (probably because I screwed up when I mounted it). Then, as I was changing that one I blew the valve off the tube with the hand pump...

I gave up and called a cab...
... It was NOT a good day!