On Monday I left the house a minute late, got a hundred feet before I realized I'd forgotten my helmet. Went back, got the helmet, headed on my way a little faster now... got to mile 2 and felt a bump, you know, that tell-tale jolt that tells you you're rear tire is going flat. I increased my speed accordingly, got another half mile. Pumped it up as fast as possible, heard it leaking, but rode on, absolutely as fast as I could ... got another mile... tire pretty flat... rode a little farther... saw my train still wasn't in the station, so I walked the last hundred yards dripping sweat. Announcement on the PA said my train was running eight minutes late. Folded up the bike and waited....

I walked the bike from Penn Station to my office, patched the tube after I got here. Just a simple puncture, cause unknown. No pinch flat, much to my relief. I patched it.