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The author’s friend wanted to check the chain of the bicycle. For this, he began taking off the gear-case. The author tried to dissuade him from doing that by telling him that if anything does go wrong with the gear-case of a bicycle, then it is cheaper to sell the bicycle than set about repairing the damaged gear-case. However, his friend disagreed and said that nothing was easier than taking off a gear-case. The author notes with sarcasm that his friend was indeed right. In less than five minutes, he had the gear-case in two pieces, lying on the path.