The whip is burning in cold water. After the whip is dipped in water or more precisely soaked in water, the whip absorbs water and expands, and the small burr on the whip expands to increase friction, which will increase the weight and toughness of the whip and cause more damage.

In ancient times, flogging was soaked or dipped in salt water instead of ordinary water. After a whip cuts a wound on a person's skin, salt water will stimulate the wound, and the pain of the so-called "sprinkling salt on the wound" can be imagined. In addition, the cells around the wound swell and rupture due to water absorption, and the damage increases. So when the whip hits the water, it hurts more when it hits people.