I know that I've had my share of awkward experiences, but only one comes to mind at the moment.
Once, when I was a teenager, we lived a few blocks from the downtown of a small historical town. I didn't have much to do back then, so I would walk downtown and take my laptop to the coffee shop, where I knew everyone, and stay there for a few hours, then maybe go to the guitar shop and play the guitars for a little bit; sometimes I visited the locally owned book store.
So, one hot summer afternoon, I think I had spent my time at the coffee shop earlier, my stomach had been feeling pretty irritated, and I had just left the guitar shop. Suddenly, as I started walking in the direction of my house, in a sudden terror, the realization of what was going on struck me: diarrhea. I had at least 3/4ths to a mile to walk, in the heat, cars passing constantly, people walking the sidewalks, and I had to hold it; there was no choice.
So, I did my best to appear nonchalant as I walked toward my house in painful determination. I was so sure that I appeared so awkward to passersby as I was walking, but the terrifying prospect of it happening in public kept me going. If I could only make it home, I would be ok.
That walk seemed to take forever and, when I got home, I was more relieved than I had been about almost anything in my entire life. Sweet relief!