I cycle pretty slowly so passing cyclists is the norm. But one day there was a cyclist with the squeakiest chain and cogs I've ever had the misfortune to encounter who rode just ahead of me on the road. The squeaking was driving me nuts and I sped up and passed him and his sad squeaky bike and continued briskly for a couple of blocks.
Several weeks later I saw the same guy on the same squeaky bike riding along the street while I was unlocking my bike. I decided to let several minutes pass by before getting on my bike. Such squeaking! How somebody stand riding that bike is beyond me.