The single-engine planes were flying above Lake Superior in Wisconsin, USA, when they crashed into each other, bursting in to flames and breaking apart. 
Skydiving instructor Mike Robinson, who was aboard one of the planes said: ‘We were just a few seconds away from having a normal skydive when the trail plane came over the top of the lead aircraft and came down on top of it. It turned into a big flash fireball, and the wing separated.
“All of us knew we had a crash. …The wing over our head was gone, so we just left,” he added, explaining that each of the skydivers managed to jump to their safety, launching their parachutes and calmly floating back to earth.
Their pilot did the same as he watched his plane spiraling out of the air and smashing into pieces. Passengers in the other plane also parachuted back down to earth as their pilot miraculously managed to land the burning aircraft, escaping only with a few bumps and bruises.
Robinson said: “It might’ve been a lot worse. Everybody, to a person, responded just as they should, including the pilots.”
An investigation is underway to determine what went wrong.