Instructions: In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.
Input: The act of cracking joints means bending a person's joints to produce a distinct cracking or popping sound, often followed by a feeling of satisfaction or relaxation to the person. It is sometimes done as part of a joint adjustment / mobilization routinely performed by a chiropractor, osteopath or physical therapist.
Output:
what causes your bones to make a cracking sound