The Physics Puzzler

You are in town, surrounded by buildings that can reflect sound, when an ambulance goes by. Your hear beats! How could that happen?

Be sure to enter your full name. Enter your email address ONLY if you want the number of points awarded e-mailed to you. Responses should be brief but complete. You must click the SUBMIT button to submit your entry. Entries are due by noon on Monday of next week.

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