Two days ago I had a flat, and fixed it by the side of the road. It was one of those fixes where things went wrong (had trouble getting the chain back on without getting grease on my hands, dropped things, cyclocomputer fell off, etc.). When I finally got it all pumped up and ready to go, I realized that I'd forgotten to check the inside of the tire to make sure the sharp object wasn't still there.
What would you do: remove tube and check or ride off and hope it wouldn't re-puncture?
I took the middle ground and left the tire on the wheel, but unhooked one side and checked. There was nothing there (flat turned out to be due to a failed patch). Luckily, I also took a quick look back, and noticed that my tire irons were on the ground.