ONSIDEKICK
Onside kick
In gridiron football, an onside kick is a kickoff deliberately kicked short. In most kickoffs, the kicking team concedes possession of the ball and tries to kick it as far as possible from its own goal. In an onside kick, the kicking team kicks short in hopes of regaining possession of the ball, which requires that an opponent touch it first but fail to control it.The above text is a snippet from Wikipedia: Onside kick
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