Jumping platform
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A platform is a naturally occurring or human-made surface for people to jump from.
Jumping platforms are usually situated above sufficiently deep water, or above mats, box springs, 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).
[edit] Platforms for cliff jumping
For cliff 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, 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.
[edit] 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 tresspassing 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 by the impact can also lead to drowning.
