A Jumping platform is a naturally occurring or human-made surface for people to jump from. It is usually situated above sufficiently deep water, or above mats, a box-spring

Box-spring

A box-spring is a type of bed base typically consisting of a sturdy wooden frame covered in cloth, and containing springs. Usually the box-spring is placed on top of a wooden or metal bedframe which sits on the floor and acts as a brace. The box-spring is usually the same size as the much softer...

 matress, piles of empty cardboard boxes, or other soft landing surfaces, or they may be used together with other means of dampening the impact (such as for example, platforms for bungee jumping). Children often improvise platforms, either on a large scale (at abandoned quarries) or on a smaller scale (e.g. by moving a desk next to a bed, to jump onto the bed from the desk).

Platforms for cliff jumping

For cliff

Cliff

In geography and geology, a cliff is a significant vertical, or near vertical, rock exposure. Cliffs are formed as erosion landforms due to the processes of erosion and weathering that produce them. Cliffs are common on coasts, in mountainous areas, escarpments and along rivers. Cliffs are usually...

 jumping, the platform is usually a simple clearing in the bushes and other vegetation along the cliff above a river, ocean, lake, or quarry.

Sometimes railway bridges and other bridges are used as platforms. They can sometimes be distances up to approximately 100 feet above the water.

Abandoned quarries

Quarries

Quarries - The "Royal Quarries" — not found in Scripture — is the namegiven to the vast caverns stretching far underneath the northern hill, Bezetha, on which Jerusalem is built. Out of these mammoth caverns stones, a hard limestone, have been quarried in ancient times for the buildings in the...

, and deep ponds will often have platforms, whether by design, or by improvisation of the people in the community. For example, platforms will often be affixed to towers in abandoned rail yards, overlooking a deep pond.

Safety and traffic control

Many naturally occurring platforms are unofficial, and simply known among the children in a community. For example, the children are often trespassing on quarry land, or the like, when they use the platforms. Usually the locals check the water to make sure it is deep enough and free of clutter, but there is always the danger of a dead fish or beverage can, bottle, branches, or the like floating near the surface of the water. Bad angle of entry can also cause injury even in the absence of clutter (e.g. broken bones or re-arrangement of internal organs from the impact of the water itself, if landing crooked). Being knocked unconscious

Unconsciousness

Unconsciousness is the condition of being not conscious—in a mental state that involves complete or near-complete lack of responsiveness to people and other environmental stimuli. Being in a comatose state or coma is a type of unconsciousness. Fainting due to a drop in blood pressure and a...

 by the impact can also lead to drowning

Drowning

Drowning is death from asphyxia due to suffocation caused by water entering the lungs and preventing the absorption of oxygen leading to cerebral hypoxia....

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Technique

For cliff jumping, there are several techniques that can be utilized. The main technique involves landing in a pencil shape typically with hands at the sides or above the head. Keeping limbs in results in a freer and more painless entry. Pointed toes and closed mouth also assist in a smooth jump. Some prefer to jump with shoes or sandals, while others jump merely barefoot or naked.

For larger jumps (40 ft +), the angle of entry is critical. To ensure that you always enter the water vertically, it is proper to jump leaning slightly forward, keeping your point of entry in view. Extend your arms for balance. As you fall, gradually tuck in your arms, and bring together your legs. A gradual backward rotation throughout the jump will bring you from your initial forward position to complete a vertical entry. Common errors include backward over rotation, which may lead to butt flops and painful enemas, not tucking in arms or legs, which can leave nasty bruises on big jumps. Generally, the highest jump that should be attempted is 100ft. The world record dive stands at 300ft (90m), set by an English Springer Spaniel

English Springer Spaniel

The English Springer Spaniel is a breed of gun dog traditionally used for flushing and retrieving game. It is an affectionate, excitable breed with an average lifespan of twelve to fourteen years. Descended from the Norfolk or Shropshire Spaniels of the mid-19th century, the breed has diverged into...

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Keep legs staight with a slight bend at the knees. Locking your legs when taking the pencil shape will cause impact on the knees