"After both skydivers deployed their parachutes and were preparing to land, a collision occurred at approximately 800 feet resulting in an entanglement that lasted several seconds," they continued.

A Navy special warfare sailor and member of the service’s parachute demonstration team was injured during the Duluth Air and Aviation Expo in Minnesota on Saturday when an airborne stunt went wrong.

However, the air in the atmosphere can change the speed of a fall, and parachutes rely on this to work. Air resistance is a type of friction, or the resistance of motion when objects rub together. You ...