New York style is danced in a line similar to L.A. style salsa. However, unlike L.A. style, it is danced on the second beat of the music ("on 2"), and the follower steps forward on the first measure of the music, not the leader. The etiquette of New York Style is strict about remaining in the "slot" and avoiding traveling dancing in a sandbox area with a lot of spins, turns and styling. There is greater emphasis on performing "shines" in which dancers separate themselves and dance solo with intricate footwork and styling for a time—suspected origins from swing and New York tap. Though he did not create New York style salsa, Eddie Torres is credited with popularizing it, and for having the follower step forward on the second beat of the first measure. There are two distinct developments of New York salsa as a music and dance genre: Primary evolution from mambo era was introduced to New York due to influx of migrating dissidents from all the Caribbean and other Latin migrants during pre/post Cuban revolution in the 1950s and 1960s. This era is known as the "palladium era". At this time, the music and dance was called "mambo" or "rumba”. The most famous dancer during this era was Puerto Rican descendant Pedro "Cuban Pete" Aguilar also known "The King of Latin Beat". Secondary evolution during the late 1970s, Latin Puerto Ricans migrants, contributed amazingly to the New York salsa development during the "NuYorican" era of Héctor Lavoe which greatly popularized salsa and modern Latin music throughout the world. Puerto Rican salsa superstars were the most important musicians during the era, such as Ray Baretto ("The Godfather") and many others. There are also salsa artists that transcend both periods, notably the legendary Puerto Rican Tito Puente ("The Mambo King"). These two developments create a fusion of a new salsa music and dance genre, different from its Latin American and L.A. style counterparts. New York style salsa emphasizes harmony with the percussive instruments in salsa music, such as the congas, timbales, and clave, since many or all of those instruments often mark the second beat in the music.