Donald Qualls Jul 10, 2006 Look like spotting lines -- used to prevent heinous accidents when learning trampoline vaults (easy to get things wrong and travel right off the mat trying to learn a flip -- which typically leads to broken bones).
Look like spotting lines -- used to prevent heinous accidents when learning trampoline vaults (easy to get things wrong and travel right off the mat trying to learn a flip -- which typically leads to broken bones).