The scenario you described is likely a riddle rather than a factual event. In this context, the answer typically involves a play on words or a creative twist rather than a logical explanation. Here are a couple of possible answers to this riddle:
1. The man died by falling off a high stack of bicycles, resulting in his death, and the bikes scattered around him are the ones that caused his fatal fall.
2. The man was a bicycle repairman fixing bicycles when a powerful storm or earthquake occurred, causing the bicycles in his shop to topple over and crush him to death.
In these riddles, the answers often involve unexpected or imaginative scenarios that play with the words used in the question. Remember, these types of riddles are meant for entertainment and creativity rather than realistic explanations.