Type of wipeout in which the tail section of the board loses traction with the wave face and quickly spin sideways. A spinout generally happens during a turn, but can also occur if a rider, while trimming, hits a steep section of wave. Spinouts are caused by riding a board too small for the conditions; by overpowering a turn or turning too quickly; or by turning through ocean-surface bump or chop. The spinout can be dangerous, especially in big waves, because it's almost always unexpected and...