Not surprised, you current status is Newbie.

Yeah, that's not fun. I was riding with a friend about a month ago on a century ride and he got 2 in the space of 20 minutes. Before I gave him my spare tube, I insisted on checking his tire and lo and behold, there was a shard of glass that had pierced through the tire and was rubbing the tubes. After it was removed, he completed the remaining 80km/50mi and the next 3 centuries over the next 3 days without another flat.