The surf lineup contains many unwritten rules and regulations. The lineup is a pecking order, where even celebrity status does not make one immune to the wrath of an angry surfer. The first and most important of these rules is you don't snake a wave from somebody, especially a local. Billy Madison a.k.a. Adam Sandler did not fully grasp this concept while recently surfing in Malibu.
On the latest episode of Conan, Sandler explains how he was violently thrown off a wave by an angry bearded truck driver.