For me flats seem to come in clusters. Had two on consecutive days in March, the second one had me cursing and throwing tools on the ground! Not a good look... Riding here in NYC, it's almost always a pinch flat from a pothole or other road deformity i didn't see in time. The impact of your wheel hitting a hard edge with such violent force both sickens and infuriates the rider! You just coast along and wait for one of the tires to start going soft...

But it's always an impact, never a puncture it seems. Started using Ribmos w/ conventional tubes years ago, and now gatorskins since the last set of Ribmos wore out. Haven't had a puncture flat since.