Please enter a fictitious Name. If your score is one of the top 20 from the last 30 days or so, the name you enter will be shown in the Top Scores Table. In New York State if a dog bites someone, usually the owner can not be sued if it is the first time that the dog has bitten anyone. The average height of people is about the same in all the countries of the world. The air cannot move quickly enough to prevent a vaccuum from forming behind the moving end of the wipe.
Air pressure causes air to move rapidly into that vaccuum.
The rapid movement of air causes the sound. The entire length of the wipe suddenly is stretched tight. That causes the whole length of wipe to move as a unit and at a very fast speed. That moves a large quantity of air quickly. That movement of air is the noise that is heard when the wipe cracks.